Divide the line segment of length 8cm in the ratio 4:3.
- draw a line segment AB of 8 cm
- draw a ray AX making an acute angle with AB
- locate points A1 , A2 , A3 , A4 , A5 , A6 and A7 on AX such that A1A2 = A2A3 = A3A4 = A4A5 = A5A6 = A6A7
- join A7 and Bconstruct a line A4P parallel to A7B
refer rough work : http://www.imagebam.com/image/8c29bc176996053