Sorry for the late answer here. Yes, this is what pixel ratio is. But with your settings, the pixel ratio for hipfire is so low that it actually isn't an issue. The bigger issue is as you can see, the game doesn't support sensitivity this high.
It is different because you are using an existing sensitivity 1 value which does not correspond to the hipfire being 45 cm. If you want only all the scopes to be 45 cm, but hipfire completely different, you need to go through each scope like this, just select a different one instead of 4.00X: https://www.mouse-sensitivity.com/?share=ccd0f9a6a78af5130b8f29bc2ec137a7