∵四边形内角和是360°
又∵∠A:∠B:∠C:∠D:=1;2:3:4
∴∠A=36°;∠B=72°;∠C=108°;∠D=144°
∴各外角分别是144°;108°;72°;36°
∴各外角的比是
4:3:2:1