|___| primul nr
|___|___|___| al doilea nr
|___|___|___|..+80..| al treilea nr
1 200 - 80 = 1 120
1+3+3=7 (segmente egale)
1 120 : 7 = 160 (valoarea unui segment)
primul nr =1×160=160
al doilea nr =3×160=480
al treilea nr =3×160+80=480+80=560
verificare:
160 + 480 + 560 = 1 200
