3804 in parti invers proportionale cu 0,(6) ; 0,75 ; 0,8 ; 0,8(3)
0,(6)=6/9=2/3
0,75=75/100=3/4
0,8=8/10=4/5
0,8(3)=(83-8)/90=75/90=5/6
a+b+c+d=3804
{a;b;c;d} i.p.{2/3; 3/4; 4/5; 5/6}
2a/3=3b/4=4c/5=5d/6=k
a=3k/2; b=4k/3; c=5k/4; d=6k/5
=>3k/2 +4k/3 +5k/4 +6k/5=3804; aducem la acelasi numitor; 60
90k+80k+75k+72k=3804•60
317k=3804•60
k=3804•60/317=12•60=720
a=3•720/2=1080
b=4•720/3=960
c=5•720/4=900
d=6•720/5=864
