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Finding the Third Proportional to 223,128 and 339,921

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Solution

The third proportional to 223,128 and 339,921 is: 517,847.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,128 : 339,921 = 339,921 : x
  2. Step 2: Convert to fraction form
    223,128/339,921 = 339,921/x
  3. Step 3: Cross multiply
    223,128x = 339,921 × 339,921
  4. Step 4: Simplify right side
    223,128x = 115,546,286,241
  5. Step 5: Solve for x
    x = 115,546,286,241/223,128
  6. Step 6: Final answer
    x = 517,847.54

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.