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Finding the Third Proportional to 3,924 and 4,491

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Solution

The third proportional to 3,924 and 4,491 is: 5,139.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,924 : 4,491 = 4,491 : x
  2. Step 2: Convert to fraction form
    3,924/4,491 = 4,491/x
  3. Step 3: Cross multiply
    3,924x = 4,491 × 4,491
  4. Step 4: Simplify right side
    3,924x = 20,169,081
  5. Step 5: Solve for x
    x = 20,169,081/3,924
  6. Step 6: Final answer
    x = 5,139.93

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.