At East Middle School, there are 585858 left-handed students and 609609609 right-handed students. The numbers of left- and right-handed students at West Junior High are proportional to the numbers at East Middle School. Which of the following could be the numbers of left-handed and right-handed students at West Junior High?
1) Left-handed: 424242, Right-handed: 483483483
2) Left-handed: 282828, Right-handed: 378378378
3) Left-handed: 484848, Right-handed: 504504504
4) Left-handed: 565656, Right-handed: 560560560
5) Left-handed: 303030, Right-handed: 315315