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Finding the Third Proportional to 872 and 1,877

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Solution

The third proportional to 872 and 1,877 is: 4,040.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    872 : 1,877 = 1,877 : x
  2. Step 2: Convert to fraction form
    872/1,877 = 1,877/x
  3. Step 3: Cross multiply
    872x = 1,877 × 1,877
  4. Step 4: Simplify right side
    872x = 3,523,129
  5. Step 5: Solve for x
    x = 3,523,129/872
  6. Step 6: Final answer
    x = 4,040.29

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.