There are many factors that establish the page rank of a site including the age of the domain and the worthiness of this content on it.
Look for sites that have great Google page rank. When you will find these search at ways to place a link on the site. 1000 backlinks link building list
Many people see article advertising sites as having a higher site position and feel by placing their report on there they are going to get good traffic. This isn't strictly true for 2 reasons. Firstly your home site of those sites will probably have the large page rank and your article is not likely to be placed on the house page. Much more likely it will probably be placed on a full page which has a site rank of zero. Secondly report websites are there for report syndication, maybe not to get backlinks.