How do the strengths of organic acids compare with the strengths of most inorganic acids

organic acids are weaker than inorganic acids. The ionization constants for organic are much lower than inorganic. This is mostly due to the non-polar nature of the organic part of the acid.

The rule is that most inorganic acids are strong and most organic acids are weak.

There are inorganic acids and there are organic acids. Basically, the word "organic" means, "containing carbon". So, of the above mentioned acids the strong acids are all "inorganic" and the weak acids are all "organic acids. O.K., someone is going to jump right down my throat because of the fact that carbonic acid does contain carbon. However, it is usually considered the exception to the rule.