If 1, 9, x and 45 are in proportion, then value of x is _____?
If 1, 9, x and 45 are in proportion, then value of x is _____?
Explanation
If 1, 9, x, and 45 are in proportion, we can set up the proportion as:1 : 9 :: x : 45
This can be written as:
1/9 = x/45
Cross-multiplying:
45 = 9x
x = 45/9
x = 5