Converting temperatures from Fahrenheit to Rankine is straightforward: simply add 459.67 to the Fahrenheit temperature. This is because the Rankine scale is an absolute temperature scale that starts at absolute zero, similar to Kelvin, but uses the same degree increments as Fahrenheit. For example, to convert 32°F (the freezing point of water) to Rankine: 32 + 459.67 = 491.67°R. This method ensures accurate temperature conversions between these two scales.