Question

The ratio of men to women in certain factory is 3 to 4 there are 216 men how many workers are ther

Answer 1

Set up a proportion that answers men : workers

3:4 is men : women, not it
3:7 is men : workers this is the one we need.

So now 3:7 = 216/x in a proportion..
Cross multiply
3(x) = 7(216)
3x = 1512
X = 504