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Finding the Third Proportional to 148,978 and 220,569

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Solution

The third proportional to 148,978 and 220,569 is: 326,562.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,978 : 220,569 = 220,569 : x
  2. Step 2: Convert to fraction form
    148,978/220,569 = 220,569/x
  3. Step 3: Cross multiply
    148,978x = 220,569 × 220,569
  4. Step 4: Simplify right side
    148,978x = 48,650,683,761
  5. Step 5: Solve for x
    x = 48,650,683,761/148,978
  6. Step 6: Final answer
    x = 326,562.87

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.