


Description 



Geometric Mean: If a/x = x/b (or x^{2} = ab), then x is called the geometric mean between a and b. The geometric mean is sometimes called the mean proportional. 
An Illustration of the Geometric
Mean
Suppose the two smaller triangles in this figure
are similar. That means that the corresponding sides are proportional. So, we
can write:
The number 6 is the geometric mean between 4 and 9.


