In reality, the only thing having that ratio would have done is let every man have multiple wives, having more children and having the population explode. In the end it would still be a male dominated society. The ratio itself isn't a good explanation of the power imbalance here.
If you girls can wait 4 years, I have the perfect solution. Marry the second princess to Faust, and then marry them yourselves. The child with the second princess inherits polidoro, while you girls get an inheritor as well. Sounds like a Win-Win-Win-Win to me!