https://www.youtube.com/watch?v=DcdeafsWlLw

Nov 1, 2009 ... Click here for the full version: http://vn2.me/epb A proportion is just an equation where two ratios are equal, and each piece of the proportion ...

https://virtualnerd.com/geometry/similarity/ratios-proportions/means-extremes-definition

Note: A proportion is just an equation where two ratios are equal, and each piece of the proportion has a special name. This tutorial will teach you those names, ...

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

The four parts of the proportion are separated into two groups, the means and the extremes, based on their arrangement in the proportion. Reading from ...

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

Jan 26, 2011 ... Explaining how to solve a proportion by cross-multiplying is pretty straightforward . It's just a procedure. Explaining why the product of the means ...

http://www.math.com/school/subject1/lessons/S1U2L2DP.html

A proportion is simply a statement that two ratios are equal. It can be written in ... Here, 20 and 5 are the extremes, and 25 and 4 are the means. Since the cross ...

https://www.cliffsnotes.com/study-guides/geometry/similarity/properties-of-proportions

Property 1 (Means‐Extremes Property, or Cross‐Products Property): If a/b = c/d, then ad =bc. Conversely, if ad = bc ≠ 0, then and . Example 1: Find a if a/12 ...

https://www.thatquiz.org/tq/previewtest?N/X/Z/V/92511444169819

is equal to the product of the extremes. *means are the middle numbers * extremes are the outside numbers. Solve Proportions Using Means & Extremes. 3:5 = 6: ...

https://www.math.uh.edu/~ctucker/Math%201312/Worksheets/1312_5o1.pdf

Property 1: (Means - Extremes Property). In a proportion, the product of the means equals the product of the extremes. If d c b a. = ,. 0. ≠ b and. 0. ≠ d.

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

Sep 16, 2004 ... In the proportion a/b = c/d, why are the a and the d called the extremes and the b and c called the means of the proportion?

https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-write-and-solve-proportions/v/find-an-unknown-in-a-proportion

Learn the reasoning behind solving proportions. We'll put some ... Practice: Proportion word problems ..... This is what it means to cross-multiply. So this is going ...