It's always helpful to phrase bug reports in terms of what problem you're experiencing rather than jumping straight to the proposed solution, because often it's not clear to the developers what problem your solution would solve.

Can you explain what problem you're having with Okular that has made you propose this as a solution?

Full-Page is too small to read and Full-Width requires too much scrolling.  With all the number factors there is surely room for another mode.

> Full-Page is too small to read
Only if your window is too small. :)

> Full-Width requires too much scrolling
Only if your window is too big. :)

If you haven't found the Trim Margins feature yet, this might make you happy.

I don't think this proposed new mode would make sense to add, especially if we can't name and explain it using human-friendly words. I can't even figure out what it would do by reading your mathematical expression.