Solving Proportion Problems

Question 1:

y is directly proportional to the cube of x. When x = 4, y = 256, find y when x = 3.

108

Question 2:

y is directly proportional to the square of x. When x = 9, y = 162, find y when x = 3.

18

Question 3:

y is inversely proportional to the cube root of x. When x = 27, y = 8, find y when x = 8.

12

Question 4:

y is inversely proportional to the square of x. When x = 8, y = 1008, find y when x = 12.

448