Question

if a:b=5:4,b:c=3:7,then a:b:c is?

Answer 1

hi friend ✋

a:b=5:4

then
a=5x
b=4x

b:c=3:7

then
b=3y
c=7y


b=4x=3y

3y/4x=b


a:b:c=5x:3y/4x:7y

=20:3:18