Steps of construction:
1. Draw a line segment, AB = 7 cm.
2. Draw a ray, AX, making an acute angle down ward with AB.
3. Mark the points A1, A2, A3 … A8 on AX.
4. Mark the points such that AA1 = A1A2 = A2A3 = ….., A7A8.
5. Join BA8.
6. Draw a line parallel to BA8 through the point A3, to meet AB on P.
Hence AP: PB = 3: 5