HTML 4.0 Table Column Proportional Width Constraints

The table below is 350 pixels wide. The columns are assigned proportional widths using COLs as follows:

This means the first column should be 50 pixels wide. The remaining width should be divided among the three remaining columns according to the proportional width statements into six (2+1+3) parts. Since the Table is 350 pixels wide, and the remaining width is 300 pixels (350-50), the remaining columns should be 100 (2*50), 50 (1*50) and 150 (3*50) pixels wide, respectively.