Sticking a potato in an overly salty dish will absorb the salt and make it less salty.
A potato can absorb some salt because it also absorbs liquid, but it’s not going to change your ratios. Instead, try to correct with a dash of acid, like vinegar or lemon juice. It’s about balance.
Either you put down the wrong numbers, or you're on the wrong medication. Because the answers definitely don't prove they are true.