Solving Proportion Problems

Question 1:

x and y are in direct proportion. When x = 6, y = 90, find y when
x = 4.

60

Question 2:

x and y are in inverse proportion. When x = 1, y = 24, find y when
x = 4.

6

Question 3:

x and y are in direct proportion. When x = 8, y = 48, find y when
x = 5.

30

Question 4:

x and y are in inverse proportion. When x = 5, y = 36, find y when
x = 6.

30