Page rank was considered to be one of the prominent factors by Google and that the websites were promoted to most of the websites to drive back the quantified link juice. Visibly the PR has been updated nearly once or couple of times a year. With the latest updates by the search engines and considering it, Matt Cutts has stated in one of his posts that Page rank is not to be considered as a significant aspects as-like the former days.
Instead, the websites that are focused to drive in a high quality links (including the quantity) from high profiles, websites and so would probably hold the higher positions in search engine results.
Having so, you may better try enhancing your website's traffic having a better content that is optimized far better than other websites & social promotion too.
Hope this link helps!