What is the value of x when 512:x::812:14?
1169
1168
1268
1178
512=112
812=172
So, 512:x::812:14
= 112:x::172:14
In a proportion, Product of means = product of extremes
⇒x×172=112×14
⇒17x2=118
⇒17x=118×2
⇒x=1168