ik-fk switch question

Hi everybody!
I´m facing a very noob issue (I guess).
I´m rigging a quadruped character. For the forelegs I have an ik and fk chain controlling the deformation bones (following the solution of Nathan Vegdhal´s Humane Rigging course), with a custom property that controls the switch on both.
What I would like to achieve is a way that if for example, I´m moving the ik leg, the fk leg follows the same position and rotation, so when I switch to the fk I can start rotating the bones from the position the ik ended. Does it make sense?
If anyone knows a way to do it, or just further explanations, please let me know.
Thanks in advance!
(By the way, sorry about my english)