Solving Proportion Problems

Question 1:

y is directly proportional to the square of x. When x = 3, y = 63, find y when x = 5.

175

Question 2:

y is directly proportional to the cube of x. When x = 2, y = 16, find y when x = 7.

686

Question 3:

y is inversely proportional to the cube of x. When x = 3, y = 2, find y when x = 1.

54

Question 4:

y is inversely proportional to the square root of x. When x = 1, y = 72, find y when x = 144.

6