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Finding the Third Proportional to 209,292 and 323,478

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Solution

The third proportional to 209,292 and 323,478 is: 499,961.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,292 : 323,478 = 323,478 : x
  2. Step 2: Convert to fraction form
    209,292/323,478 = 323,478/x
  3. Step 3: Cross multiply
    209,292x = 323,478 × 323,478
  4. Step 4: Simplify right side
    209,292x = 104,638,016,484
  5. Step 5: Solve for x
    x = 104,638,016,484/209,292
  6. Step 6: Final answer
    x = 499,961.85

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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.