The first three spectral lines of H -atom in the Balmer series are given $\lambda_1, \lambda_2, \lambda_3$ considering the Bohr atomic model, the wave lengths of first and third spectral lines $\left(\frac{\lambda_1}{\lambda_2}\right)$ are related by a factor of approximately ${ }^{\prime} x^{\prime} \times 10^{-1}$. The value of $x$, to the nearest integer, is $\_\_\_\_$ .