Where's the ProportionalWidths equivalent for 5.4.5 ITextSharp?

Question

I am using ITextSharp 4.1.2 and trying to upgrade to 5.4.5.. while having adjustments about old codes I couldn't find out the ProportionalWidths property for the PdfPTable (old Table) class.

Would be pdfptable.SetWidths(new float[] { values } );

?

Thank's a lot.