Double Declining Balance

I am trying to use the DDB formula and in the final year the carrying value does not equal the salvage value. It is off by 217.60. Is there a way I can force the numbers of the last year to equal so that the caryying value equals the salvage value. The numbers I'm dealing with are, Cost=260000, Salvage=20000, Useful Life=5, and the period is just each year(i.e. 1, 2, 3..). Thanks for the help!