The points U, V, W and X all lie on the same line segment, in that order, such that the ratio of U, V, colon, V, W, colon, W, XUV:VW:WX is equal to 1, colon, 3, colon, 3, .1:3:3. If U, X, equals, 42, commaUX=42, find U, W, .UW.