Refer to the figure to complete the proportion.
a/b=/h
y
x
c
b

y

Step-by-step explanation:

In the figure Altitude of the hypotenuse AC divides the right triangle into two  triangles, that are similar to each other

triangle ABC is similar to triangle ACD

WE make a proportion using the sides of the similar triangles

AD/ AB= AC/ CD

So missing term in the proportion is 'y'

To complete the proportion we use 'y'