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Finding the Third Proportional to 426,238 and 636,439

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Solution

The third proportional to 426,238 and 636,439 is: 950,301.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,238 : 636,439 = 636,439 : x
  2. Step 2: Convert to fraction form
    426,238/636,439 = 636,439/x
  3. Step 3: Cross multiply
    426,238x = 636,439 × 636,439
  4. Step 4: Simplify right side
    426,238x = 405,054,600,721
  5. Step 5: Solve for x
    x = 405,054,600,721/426,238
  6. Step 6: Final answer
    x = 950,301.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.