Which of the following is necessary to gain meaningful comparisons when analyzing ratios?

To gain meaningful comparisons when analyzing financial ratios, adjusting for inflation over time is crucial. Without this adjustment, the ratios might only reflect nominal values, which can distort the economic reality of a company's performance. Inflation affects the purchasing power of money and, consequently, the financial metrics over time. By accounting for inflation, analysts can ensure that they are comparing "like with like," making it possible to see how a company's financial health and performance have genuinely changed over periods, rather than just reflecting changes in currency value.

This approach allows for a more accurate assessment of growth, profitability, and efficiency, enabling stakeholders to make informed decisions. Therefore, adjusting for inflation enhances the relevance and reliability of the financial ratios being analyzed.