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Finding the Third Proportional to 392,421 and 607,508

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Solution

The third proportional to 392,421 and 607,508 is: 940,484.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,421 : 607,508 = 607,508 : x
  2. Step 2: Convert to fraction form
    392,421/607,508 = 607,508/x
  3. Step 3: Cross multiply
    392,421x = 607,508 × 607,508
  4. Step 4: Simplify right side
    392,421x = 369,065,970,064
  5. Step 5: Solve for x
    x = 369,065,970,064/392,421
  6. Step 6: Final answer
    x = 940,484.76

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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.