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Finding the Third Proportional to 423,515 and 636,218

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Solution

The third proportional to 423,515 and 636,218 is: 955,747.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,515 : 636,218 = 636,218 : x
  2. Step 2: Convert to fraction form
    423,515/636,218 = 636,218/x
  3. Step 3: Cross multiply
    423,515x = 636,218 × 636,218
  4. Step 4: Simplify right side
    423,515x = 404,773,343,524
  5. Step 5: Solve for x
    x = 404,773,343,524/423,515
  6. Step 6: Final answer
    x = 955,747.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.