\(a:b=3:2\) এবং \(b:c=3:2\) হলে, \(a+b:b+c\) কত নির্ণয় করি।
\(a:b=3:2\) এবং \(b:c=3:2\) হলে \((a+b):(b+c) =3:2\)
\(a:b=3:2=9:6\)
\(b:c=3:2=6:4\)
\(\therefore a:b:c=9:6:4\)
ধরি, \(a=9x, b=6x\) এবং \(c=4x\)
\(\therefore (a+b):(b+c)=9x+6x:6x+4x\)
\(=15x:10x=3:2\)