For example, Amazon.com I believe would be an example of a hybrid-fluid-fixed.
Really have no idea what an example of a purely proportional layout would be.
Types of Webpage Layouts are, per Wikipedia's Web Design page:
- Fixed layout: Pixel measure results in fixed or static content
- Proportional layout: Em measure results in proportional content that is relative to font-size
- Fluid layout: Percent measure results in fluid content that shrinks and grows to "fit" display windows
- Hybrid layout: Incorporates any combination of fixed, proportional or fluid elements within (or pointing to) a single page.