Martin Ohm is considered to be the golden ratio inventor, according to MathWorld, as he first used the term "golden section" in 1835. The golden ratio is a value such that x / 1 = 1 / (1 - x).
A rectangle adhering to the golden ratio would have a height of x and a width of 1 that could be divided at a height of x - 1 such that the new rectangle would have the same ratio of height to width.
The value for x that creates the golden ratio is an irrational constant equal to approximately 1.62. This ratio is quite important in mathematics, as it is approximated in the Fibonacci sequence and is often seen in natural formations, such as the shell of a nautilus.