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The task asks to use two of the number cards provided (3, 4, 5, 10, 15) to create equivalent ratios, with the format:

\[ \text{(Number 1)} : 1 = \text{(Number 2)} : 5 \]

We need to find values for "Number 1" and "Number 2" that make these ratios equivalent. This means that both sides of the equation should represent the same proportional relationship.

### Step-by-step solution:
We are given:
\[
\frac{\text{(Number 1)}}{1} = \frac{\text{(Number 2)}}{5}
\]

This implies:
\[
\text{Number 1} = \frac{\text{Number 2}}{5}
\]

Now, let's try out each card value to check for equivalence:
- If **Number 2 = 15**, then:
  \[
  \text{Number 1} = \frac{15}{5} = 3
  \]
  So, the equivalent ratio is:
  \[
  3 : 1 = 15 : 5
  \]
  This ratio works!

Thus, the correct solution is:
- **Number 1 = 3**
- **Number 2 = 15**

Would you like more details on this or have any further questions?

Here are some related questions for further exploration:
1. Can you think of another equivalent ratio using the remaining number cards?
2. What is the general rule for finding equivalent ratios?
3. How do you simplify ratios in mathematics?
4. Can equivalent ratios be expressed as fractions?
5. How are ratios used in real-life situations?

**Tip:** Always check if you can simplify both terms of a ratio by dividing them by the same number to find simpler equivalent ratios!

Use two of the number cards to complete the ratios so that they are equivalent. (3, 4, 5, 10, 15)

Learn how to solve a ratio problem using number cards 3, 4, 5, 10, and 15 to find equivalent ratios. This step-by-step guide walks you through the process of identifying the correct numbers to maintain proportion. Suitable for students in Grades 6-8.

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