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Finding the Third Proportional to 320,505 and 683,908

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Solution

The third proportional to 320,505 and 683,908 is: 1,459,353.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,505 : 683,908 = 683,908 : x
  2. Step 2: Convert to fraction form
    320,505/683,908 = 683,908/x
  3. Step 3: Cross multiply
    320,505x = 683,908 × 683,908
  4. Step 4: Simplify right side
    320,505x = 467,730,152,464
  5. Step 5: Solve for x
    x = 467,730,152,464/320,505
  6. Step 6: Final answer
    x = 1,459,353.68

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.