Everything is symmetrical in its own way

Algebra Level 1

Find $\color{#3D99F6}{A}:\color{#D61F06}{S}:\color{#20A900}{K}$ if $\dfrac{\color{#3D99F6}{A}+\color{#D61F06}{S}}{2}=\dfrac{\color{#D61F06}{S}+\color{#20A900}{K}}{3}=\dfrac{\color{#3D99F6}{A}+\color{#20A900}{K}}{4}.$