Well, a few things to get you started. The calculator you are using is for a cantilever and this is not one.
The part you are calling the "fulcrum" is actually a counter-balance to the load. The ram is the point load on your beam.
Try studying a sketch of what you are trying to do and visualize the forces. What you need to think about is what load do you want the ram to lift in that configuration before the beam fails at that ram connection point. The load at the ram will be 3:1 of the desired load-lift. Also, don't forget to factor in a Safe Working Load (SWL) for the beam sizing.
Generally, I will not give you the answer to your question, but I **will** guide you into discovering how to solve this yourself.