The overall form of the cross is 3 : 4.
416 cm : 551 cm
=
3 : 4
The large bottom arm and width of the cross relate as 3 : 4.
315 cm : 416 cm
=
3 : 4
The top and bottom arm of the cross relate as 3 : 4.
236 cm : 315 cm
=
3 : 4
So the four measures of the cross-formate are all related by 3 : 4 and form a sequence within the plastic number series.
236 cm 315 cm 416 cm 515 cm
1 4:3 7:4 7:3
Together they define three rectangular forms:
a vertical 3 : 4
Together they define three rectangular forms:
a horizontal 3 : 4
Together they define three rectangular forms:
a horizontal 4 : 7