No doubt that risk management is very important in a trading and that you can not success without in a trading. But, regarding the R:R ive got some questions.

Let's say your R:R is 1:3, and you start trading, and what if trade doesn't go in your favor? You cannot close it 3 times bigger than your loss, for example; its impossible for it to go more than 1.5% up for your profit. Then all of the 1:3 R:R theory falls into the water? Or what? Can someone explain it better?