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Finding the Third Proportional to 222,728 and 345,408

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Solution

The third proportional to 222,728 and 345,408 is: 535,660.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,728 : 345,408 = 345,408 : x
  2. Step 2: Convert to fraction form
    222,728/345,408 = 345,408/x
  3. Step 3: Cross multiply
    222,728x = 345,408 × 345,408
  4. Step 4: Simplify right side
    222,728x = 119,306,686,464
  5. Step 5: Solve for x
    x = 119,306,686,464/222,728
  6. Step 6: Final answer
    x = 535,660.92

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.