A while back, when I was working on the fair isle sweater, I entered in this blog a way to calculate how to make balanced increases across a row of knitting.
Looking back at it, trying to make my Wallaby increases work, I discover it's a bunch of hooey (so to speak). So I went .here..... It's a calculator. You just plug in your figures and print.
So I am posting it here, so that I can refer to it. And so can you.