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Finding the Fourth Proportional to 331,821.70, 497,732.55 and 82,503.70

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Solution

The fourth proportional to 331,821.70, 497,732.55 and 82,503.70 is: 123,755.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,821.70 : 497,732.55 = 82,503.70 : x
  2. Step 2: Convert to fraction form
    331,821.70/497,732.55 = 82,503.70/x
  3. Step 3: Cross multiply
    331,821.70x = 497,732.55 × 82,503.70
  4. Step 4: Simplify right side
    331,821.70x = 41,064,776,985.44
  5. Step 5: Solve for x
    x = 41,064,776,985.44/331,821.70
  6. Step 6: Final answer
    x = 123,755.55

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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.