Given number sequence is 28, 16, 28, 76, 274
Here the sequence follows a pattern that
28
28 x 0.5 + 2 = 14 + 2 = 16
16 x 1.5 + 4 = 24 + 4 = 28
28 x 2.5 + 6 = 70 + 6 = 76
76 x 3.5 + 8 = 266 + 8 = 274
274 x 4.5 + 10 = 1233 + 10 = 1243
Hence, the next number in the given number sequence is 1243.
