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C : R : (F − 32) : (K − 273) : (Ra - 491) = 100 : 80 : 180 : 100 : 180

Contoh

Sebuah benda memiliki suhu 60°C. Tentukan suhu benda pada skala:

(A)   Reamur

(B)   Fahrenheit

(C)   Kelvin

(A)   Reamur

$$\begin{array}{rl}& \frac{60-0}{x-0}=\frac{100-0}{80-0}\\ \\ & \frac{60}{x}=\frac{{\cancel{100}}^5}{{\cancel{80}}^4}\\ \\ & \frac{60}{x}=\frac{5}{4}\\ \\ & 5.x=60.4\\ \\ & 5.x=240\\ \\ & x={48}^{\text{o}}\text{ R}\end{array}$$

(B)   Fahrenheit

$$\begin{array}{rl}& \frac{60-0}{x-32}=\frac{100-0}{212-32}\\ \\ & \frac{60}{x-32}=\frac{{\cancel{100}}^5}{{\cancel{180}}^9}\\ \\ & \frac{60}{x-32}=\frac{5}{9}\\ \\ & {\cancel{5}}^1.(x-32)={\cancel{60}}^{12}.9\\ \\ & x-32=12.9\\ \\ & x-32=108\\ \\ & x={140}^{\text{o}}\text{ F}\end{array}$$

(C)   Kelvin

$$\begin{array}{rl}& \text{K}=\text{C}+273\\ \\ & \text{K}=60+273\\ \\ & \text{K}=333\text{ K}\end{array}$$