Set up apache to alias a nodejs application?

I have a PHP application being served through apache on port 80. I have a nodejs application running standalone on port 3000. I want to make ajax requests from the client side code generated by PHP to the nodejs application. The problem is the same origin policy won't allow a different port, and I can't run both nodejs and apache on port 80.

What I would ideally like to do is have them both appear to run on port 80 from the client's perspective. How can I set up apache to reroute/alias/whatever certain requests to the nodejs application?

Hope that makes sense. Note: Not sure if this is possible, or if I am going about it in the right way - open to suggestions.