If 1A: 1b: 1C = 2:3:4, then a: B: C=______ ．

Let 1A = 2K, 1b = 3k, 1c = 4K (K ≠ 0), a = 12K, B = 13K, C = 14K, a: B: C = 12K: 13K: 14k = 12:13:14

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