Question

If 30, 40, 45 and X are in proportion, find the value of X ?

Answer 1

correct answer is 60

Step-by-step explanation:

Let us make the ratios as

A:B::C:D

then it becomes,

30:40::45:X

now multiply AD=BC

30*X=40*45

30X=1800

X=1800/30

finally,. X=60

so the value of X is "60"