how to find equal distance between four points

Hey, what's the easiest method to figure this out? I need to make sure the distance between each point is equal, like 50 pips (I'm working with 4 different points on the chart). I can work with Gann box or Fibonacci for 3 points, but when it comes to 4 points, I'm not sure how to handle it with those tools... am I missing something?