如何在表中使用相同大小的可变列混合使用固定列和可变列？

I've got a HTML table that has four columns of data, retrieved from a SQL database. The table is styled with CSS to be the full width of the page. The first and third columns are of a fixed size. I want the other two columns to change size with the table but for the two variable width columns to always be the same size.I've got a HTML table that has four columns of