a/3=b/15=c/24 a+b=c=504
3 simplificam cu 3=1
15 simplificam cu 3=5
24 simplificam cu 3=8
a/3=b/5=4/8=k
a=1k
b=5k }1k+5k+8k=504 k=504:14=36
c=8k 14k=504
a=36
b=5×36=180
c=8×36=288
v:36+180+288=504
