Approximation of a Cube Root
Similar to the process of approximating a square root, which
is done according to the area of a square, the approximation of a
cube root, can be worked out as follows:
Suppose that we are going to determine the cube root of a
number a. Without loss of generality, we can assume that a is a
positive number. Thus, in fact, we seek the measure of the side of
a cube having volume a. Now, if the side of the cube has measure
b, we have: