It seems like you might be looking for a specific relationship or pattern between the temperatures mentioned (40 degrees, 273 degrees, and \( x \)). However, the problem as stated doesn't provide enough information to determine a specific value for \( x \).
If these degrees are in Celsius or Fahrenheit, or if they relate to any specific formula or context (like a temperature conversion, average temperature, etc.), please provide more details.
If you are looking for an average, the average of 40 degrees and 273 degrees would be:
\[ \text{Average} = \frac{40 + 273 + x}{3} \]
Without additional context, it's difficult to determine the exact value of \( x \). Please clarify what relationship or rule you are applying to these values!