Question 1086281
a is 2/5 th of B
so a=2:b=5
where b=4, c=3
so where b=5, c=3.75 (set it up as a proportion and cross-multiply)
2:5:3.75
multiply these by 4 to make them integers
8:20:15; note that A:B is 2:5 and B:C as 4:3
add these 3 (43)
divide 1290/43=30
that ratio, multiplied by 30, will be the answer
240:600:450
They add to 1290.