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Finding the Third Proportional to 309,269 and 478,868

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Solution

The third proportional to 309,269 and 478,868 is: 741,472.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,269 : 478,868 = 478,868 : x
  2. Step 2: Convert to fraction form
    309,269/478,868 = 478,868/x
  3. Step 3: Cross multiply
    309,269x = 478,868 × 478,868
  4. Step 4: Simplify right side
    309,269x = 229,314,561,424
  5. Step 5: Solve for x
    x = 229,314,561,424/309,269
  6. Step 6: Final answer
    x = 741,472.83

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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.