Melanie is making necklaces in four different lengths. In each necklace, the ratio of blue beads to orange beads remains the same as shown in the diagram. The table shows the number of blue beads and the number of orange beads that Melanie will use on each of the four necklaces.

Necklace Number of Blue Beads Number of Orange Beads
1 45
2 30 6
3 8
4 20