Question

Find fourth proportional of 72cm,1.2 m ,60mm

Answer 1

Here is your answer,

72 : 1.2 : : 60 : X

Product of mean = Product of extreme

so, 72 × X = 1.2 × 60

72 × X = 72 ( 1.2 × 60 )

X = 72

72

X = 1

so, 1 is the fourth proportional to 72 , 1.2 and 60.....

Hope it helps..!!