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Finding the Third Proportional to 3,191 and 3,605

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Solution

The third proportional to 3,191 and 3,605 is: 4,072.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,191 : 3,605 = 3,605 : x
  2. Step 2: Convert to fraction form
    3,191/3,605 = 3,605/x
  3. Step 3: Cross multiply
    3,191x = 3,605 × 3,605
  4. Step 4: Simplify right side
    3,191x = 12,996,025
  5. Step 5: Solve for x
    x = 12,996,025/3,191
  6. Step 6: Final answer
    x = 4,072.71

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.