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Finding the Fourth Proportional to 331,490.76, 497,235.78 and 82,172.76

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Solution

The fourth proportional to 331,490.76, 497,235.78 and 82,172.76 is: 123,259.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,490.76 : 497,235.78 = 82,172.76 : x
  2. Step 2: Convert to fraction form
    331,490.76/497,235.78 = 82,172.76/x
  3. Step 3: Cross multiply
    331,490.76x = 497,235.78 × 82,172.76
  4. Step 4: Simplify right side
    331,490.76x = 40,859,236,413.35
  5. Step 5: Solve for x
    x = 40,859,236,413.35/331,490.76
  6. Step 6: Final answer
    x = 123,259.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.