For a damped spring-mass system, mass $\boldsymbol{m}=10 \mathrm{~kg}$, stiffness $\boldsymbol{k}=10^{3} \mathrm{~N} / \mathrm{m},$ and damping coefficient $c=20 \mathrm{~kg} / \mathrm{s}$. The ratio of the amplitude of oscillation of the first cycle to that of the fifth cycle is _____________(round off to 1 decimal place).

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For a damped spring-mass system, mass $\boldsymbol{m}=10 \mathrm{~kg}$, stiffness $\boldsymbol{k}=10^{3} \mathrm{~N} / \mathrm{m},$ and damping coefficient $c=20 \mathrm{~kg} / \mathrm{s}$. The ratio of the amplitude of oscillation of the first cycle to that of the fifth cycle is _____________(round off to 1 decimal place).