Get correct ratio coupling in CATIA V5

Multi-sections solid (even multi-sections surface) tool is a little bit tricky for uneven sketches.

To apply the correct coupling for uneven shapes, say a circle and a rectangle, is a little tedious as you need to create same number of points on circle as the rectangle. And even sometimes you may not get the perfect matching points by manually placing them. So here is the solution to get over with. It may be a little lengthy but gives you the perfect result.