To solve the proportion \( \frac{4}{5} = \frac{1}{n} \), we can cross-multiply:

\[
4 \times n = 5 \times 1
\]

This simplifies to:

\[
4n = 5
\]

Now, solve for \( n \) by dividing both sides by 4:

\[
n = \frac{5}{4}
\]

Thus, \( n = 1.25 \).

Would you like further details or have any questions?

Here are 5 related questions:
1. How do you solve other types of proportions?
2. What happens if both sides of the proportion are fractions?
3. How do you use proportions in real-life problems?
4. How do you solve a proportion with a variable on both sides?
5. How do you simplify complex ratios?

**Tip:** Proportions can be used to solve scaling problems, such as adjusting a recipe or resizing a model.

Learn how to solve the proportion 4:5 = 1:n using the cross-multiplication method. This guide provides a clear, step-by-step explanation suitable for students in Grades 6-8, covering key concepts like proportions, solving for variables, and practical applications.

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