Ratio of what to what?
They look well positioned in terms of being pulled away from the rack and screen behind them.
Measure left tweeter to left ear at sitting position. Measure right tweeter to right ear. Average the two out (they should be ABOUT the same distance). Take the average and multiply by .83. That gives you distance your speakers should be apart (measured tweeter to tweeter). This is by no means an absolute, but its a good starting point. There is a lot more that goes into setting up speakers properly. A lot more. But this is a good starting formula I've found to work well. It rarely ends up being exactly 83% (sometimes 81%, sometimes 84%), but its never been 47%!
EXAMPLE: Left tweeter to left ear is 143 inches. Right tweeter to right ear is 144 inches. 143.5 x .83 = 119.105 inches. Move speakers so tweeters are 119 inches from tweeter to tweeter. Again, this does not take into account all the things you must do first (measure the speaker distance from the back wall, side walls, toe in adjustment, rake adjustment, etc., etc.)
After 35 years, I've gotten pretty good at this and I've read and studied way more than any normal person would!
Proper setup it takes time and it usually takes me 2-3 times from start to finish before I'm 100% satisfied with the result.
There are also often physical limitations (which are also sonic limitations in many cases) in almost every room where I've set up speakers. My family room for example (where I have my Sonus Faber Mementos), has all the recipes for a horrible sounding room, but through a lot of effort and work, I've managed to make the setup pretty damn good.
Jon, I cannot tell you the number of rooms I go into and the speakers are not even close to being set up properly. People have no idea what their speakers can truly sound.
Mike
