The mean proportion of any two given positive numbers is also termed the geometric mean. Unlike the more common arithmetic mean, or the "average" in which you add a set of numbers and divide by the number of numbers, the proportional mean between two numbers is determined by the square root of their product.
Things You'll Need
 Scientific calculator

Identify the two numbers for which you wish to find their mean proportion. For example, consider 23 and 44.

Get the product of the two numbers by multiplying them. For this example, the product of 23 and 44 is 1,012.

Find the square root of the product of the two numbers to determine their mean proportion. For this example, use a scientific calculator to find that the square root of 1,012 is 31.81.
References
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