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Finding the Third Proportional to 2,431 and 2,911

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Solution

The third proportional to 2,431 and 2,911 is: 3,485.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,431 : 2,911 = 2,911 : x
  2. Step 2: Convert to fraction form
    2,431/2,911 = 2,911/x
  3. Step 3: Cross multiply
    2,431x = 2,911 × 2,911
  4. Step 4: Simplify right side
    2,431x = 8,473,921
  5. Step 5: Solve for x
    x = 8,473,921/2,431
  6. Step 6: Final answer
    x = 3,485.78

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Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.