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What's the Means-Extremes Property of Proportions? The means-extremes property of proportions allows you to cross multiply, taking the product of the means and setting them equal to the product of the extremes. This property comes in handy when you're trying to solve a proportion. Watch this tutorial to learn more!

www.wyzant.com/resources/lessons/math/algebra/proportions

Remembering that "mean" is a type of average may help you remember that the means of a proportion are "in the middle" when reading left-to-right, top-to-bottom. Both the means and the extremes are illustrated below. Solving a Proportion. The illustration of the means and extremes is shown again for your reference.

www.wyzant.com/resources/blogs/14833/means_and_extremes

Writing the proportion this way helps you understand why we use the terms means and extremes. The two middle numbers are the means, and the two outer numbers are the extremes. To make sense of the term cross-multiply, though, you should write this proportion using fraction notation:

www.reference.com/math/definition-extremes-math-72d4a1f54...

What Is the Definition of Extremes in Math? When solving proportions in math, the outer terms in the calculation are the extremes, and the middle terms are called the means. When setting the proportion equation a/b = c/d, the a and the d figures are the extremes.

mathforum.org/library/drmath/view/65583.html

That is, originally "extremes" were the whole thing and the small piece, while the "means" were two EQUAL numbers in the middle of the proportion, like 9:6 = 6:4. Now it makes sense: in fact, 6 is called the "geometric mean" in that case, and 9 and 4 are reasonable "extremes" around the "mean" of 6.

www.answers.com/Q/What_is_the_Means-Extremes_Product...

The means-extreme property of proportions is the method that allows you to cross multiply an equation to find the answer. An example would be, if a/b = c/d then ad = bc.

www.tutorvista.com/math/means-and-extremes-of-proportions

Introduction to means and extremes of proportions: In our daily life, many a times we compare two quantities of the same type. The comparison by division is the Ratio. We can say that the two ratios are in proportion when both are equal. The symbol ‘:’ or ‘=’ are used to equate the two ratios.

www.youtube.com/watch?v=AsNYLh9CF_0

An explanation of the parts of a proportional equation, the means and the extremes, and how to use the Multiplication Property of Equality to solve for an unknown variable. Also, how to solve it ...

www.muncysd.org/cms/lib7/PA06000076/Centricity/Domain/75...

Proportions • If the ratio of a/b is equal to the ratio c/d; then the following proportion can be written: • The values a and d are the extremes. The values b and c are the means. When the proportion is written as a:b = c:d, the extremes are in the first and last positions. The means are in the two middle positions. = Means Extremes