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Finding the Fourth Proportional to 331,738.60, 497,607.90 and 82,420.60

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Solution

The fourth proportional to 331,738.60, 497,607.90 and 82,420.60 is: 123,630.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,738.60 : 497,607.90 = 82,420.60 : x
  2. Step 2: Convert to fraction form
    331,738.60/497,607.90 = 82,420.60/x
  3. Step 3: Cross multiply
    331,738.60x = 497,607.90 × 82,420.60
  4. Step 4: Simplify right side
    331,738.60x = 41,013,141,682.74
  5. Step 5: Solve for x
    x = 41,013,141,682.74/331,738.60
  6. Step 6: Final answer
    x = 123,630.90

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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.