PHP, 62 Bytes
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<!-- language: lang-php -->

Order Kelvin , Celsius , Rankine , Fahrenheit

    print_r([$t=($argn+183.205)/1.4,$t-273.15,$t*=1.8,$t-459.67]);

[Online Version][1]

PHP, 64 Bytes
-------------

Order Kelvin , Rankine , Fahrenheit , Celsius

    print_r([$k=($argn+183.205)/1.4,$r=1.8*$k,$r-459.67,$k-273.15]);

[Online Version][2]


  [1]: http://sandbox.onlinephpfunctions.com/code/42403661677c964f30a4332b964820d6828ca937
  [2]: http://sandbox.onlinephpfunctions.com/code/80b1bf69b00ae400d0440039ce8be0750b67ae0c