**Introduction**

The Rank Size Rule is a fundamental concept in urban geography that helps analyze the distribution of city populations. It states that the population of a city is inversely proportional to its rank in the hierarchy of cities within a country or region. In this guide, we will explore how to use the Rank Size Rule formula, provide a step-by-step example, and offer an HTML code for a Rank Size Rule Calculator.

**How to Use**

To use the Rank Size Rule, follow these steps:

- Identify the population of the largest city (P1) in the region or country.
- Determine the population of the city you want to analyze (Pn), which is ranked nth in the hierarchy.
- Use the formula: n = P1 / Pn, where n represents the rank of the city in the hierarchy.

**Formula**

The Rank Size Rule formula is: n = P1 / Pn Where:

- n is the rank of the city.
- P1 is the population of the largest city.
- Pn is the population of the analyzed city.

**Example**

Let’s say the largest city in a country has a population of 5 million (P1), and you want to analyze the population of a city ranked 3rd (Pn) in the hierarchy. Using the formula: n = P1 / Pn n = 5,000,000 / Pn

**FAQs (Frequently Asked Questions)**

**What is the Rank Size Rule?**- The Rank Size Rule is a concept in urban geography that describes the relationship between the population of a city and its rank within a country or region.

**Why is the Rank Size Rule important?**- It helps researchers understand how populations are distributed among cities and can provide insights into urban development and hierarchy.

**Does the Rank Size Rule apply universally?**- No, the rule may not apply perfectly to all regions, as it depends on various factors like historical development and migration patterns.

**What if the calculated rank (n) is not a whole number?**- In such cases, round the result to the nearest whole number. The closest whole number represents the city’s rank.

**Conclusion**

The Rank Size Rule is a valuable tool for analyzing urban population distribution. By using the formula (n = P1 / Pn), you can determine a city’s rank within a hierarchy.