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Finding the Third Proportional to 277,418 and 430,383

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Solution

The third proportional to 277,418 and 430,383 is: 667,691.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    277,418 : 430,383 = 430,383 : x
  2. Step 2: Convert to fraction form
    277,418/430,383 = 430,383/x
  3. Step 3: Cross multiply
    277,418x = 430,383 × 430,383
  4. Step 4: Simplify right side
    277,418x = 185,229,526,689
  5. Step 5: Solve for x
    x = 185,229,526,689/277,418
  6. Step 6: Final answer
    x = 667,691.09

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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.