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Finding the Third Proportional to 3,916 and 4,408

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Solution

The third proportional to 3,916 and 4,408 is: 4,961.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,916 : 4,408 = 4,408 : x
  2. Step 2: Convert to fraction form
    3,916/4,408 = 4,408/x
  3. Step 3: Cross multiply
    3,916x = 4,408 × 4,408
  4. Step 4: Simplify right side
    3,916x = 19,430,464
  5. Step 5: Solve for x
    x = 19,430,464/3,916
  6. Step 6: Final answer
    x = 4,961.81

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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.