Solving Proportion Problems

Question 1:

y is directly proportional to the square of x. When x = 2, y = 16, find y when x = 5.

100

Question 2:

y is directly proportional to the cube of x. When x = 10, y = 2000, find y when x = 4.

128

Question 3:

y is inversely proportional to the square of x. When x = 10, y = 288, find y when x = 12.

200

Question 4:

y is inversely proportional to the cube of x. When x = 1, y = 216, find y when x = 3.

8