The returned value of PasteSpecial is the shaperange which is pasted, so you can use that directly:
Sub PasteTable() Dim myShape As Object 'paste excel table as enhanced metafile, then resize to full width Set myShape = ActiveWindow.Selection.SlideRange(1).Shapes.PasteSpecial(ppPasteEnhancedMetafile) With myShape .LockAspectRatio = True .Top = 70 'points from top .Left = 10 'points from left .Width = 700 'points wide End With End Sub