Question: what does 4 in 1 mean?
Answer: it means it (divider line) divides the AB line segment in ratio 4:1. In other words there are total five parts in which selected parts are four. and the division makes the ratio between them is 4:1 one got four parts and other only one ( total minus four 5–4=1) So, 4:1 is nothing but Ratio. 1.8K views.