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Finding the Third Proportional to 257,285 and 397,592

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Solution

The third proportional to 257,285 and 397,592 is: 614,413.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,285 : 397,592 = 397,592 : x
  2. Step 2: Convert to fraction form
    257,285/397,592 = 397,592/x
  3. Step 3: Cross multiply
    257,285x = 397,592 × 397,592
  4. Step 4: Simplify right side
    257,285x = 158,079,398,464
  5. Step 5: Solve for x
    x = 158,079,398,464/257,285
  6. Step 6: Final answer
    x = 614,413.58

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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.