Not too sure I have understood you here, but... Let's say you have a value in cell A1 and you wnat that same value is B1,C1 and D1. There are 2 simple ways.
1 In cell B1 put =$A1 and copy accross to D1
2 Select cells B1:D1 type =A1 in the formula bar, then enter with Ctrl+Shift+Enter
Either method can then be copied down. Personally I would opt for method 1 as method 2 creates an array as is less flexible.