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Finding the Third Proportional to 2,387 and 4,478

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Solution

The third proportional to 2,387 and 4,478 is: 8,400.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,387 : 4,478 = 4,478 : x
  2. Step 2: Convert to fraction form
    2,387/4,478 = 4,478/x
  3. Step 3: Cross multiply
    2,387x = 4,478 × 4,478
  4. Step 4: Simplify right side
    2,387x = 20,052,484
  5. Step 5: Solve for x
    x = 20,052,484/2,387
  6. Step 6: Final answer
    x = 8,400.71

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Why These Related Problems?

These problems maintain the same ratio (1.88) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.