Backlink Anchors and Link juice vs onpage SEO.

To make the experiment more interesting I've created a new site which doesn't mention the target keyword.  I am now going to link to that page with the target keyword as the anchor.

This should show how google treats relevant anchor text from an off page source compared to the keyword density and actual relevance of the content on the page.  This page already ranks for the target keyword - will that relevance go with the link juice even if the target URL doesn't have hardly any, if any mention of the target keyword?

That's what I'm trying to find out, as usual the target keyword is the ubiquitous x453gogjf94rturdrfglrkto Which is a good test because only my few test sites rank for this ver specific keyword.  I am still waiting for the high density 'Master of x453gogjf94rturdrfglrkto
' to rank to see how it compares to the lower density words, currently the rankings as stated in my first post are still standing.  Let's see how this changes the situation.