Two positively charged particles m1 and m2 have been accelerated across the same potential difference of 200 keV as shown below.

[Given mass of $$m_{1}$$ = 1amu and $$m_{2}$$ = 4amu]
The deBroglie wavelength of $$m_{1}$$ will be x times of $$m_{2}$$. The value of x is_______(nearest integer)