Question

if 3 : x :: x : 147 find 2x

Answer 1

Answer:

2x = 42

Step-by-step explanation:

we know that  if a : b =  c : d

then ad = bc

we can apply this rules here

a= 3, b=x, c=x, d= 147

$ad =bc\\3\times 147 = x\times x\\x^2 =441\\x =\sqrt{441} \\x=21$

The required is 2x = 2 x 21 =42

Thefore required 2x is 42