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Finding the Third Proportional to 129,464 and 203,430

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Solution

The third proportional to 129,464 and 203,430 is: 319,654.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,464 : 203,430 = 203,430 : x
  2. Step 2: Convert to fraction form
    129,464/203,430 = 203,430/x
  3. Step 3: Cross multiply
    129,464x = 203,430 × 203,430
  4. Step 4: Simplify right side
    129,464x = 41,383,764,900
  5. Step 5: Solve for x
    x = 41,383,764,900/129,464
  6. Step 6: Final answer
    x = 319,654.61

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.