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Finding the Fourth Proportional to 331,644.80, 496,408.80 and 261,660.80

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Solution

The fourth proportional to 331,644.80, 496,408.80 and 261,660.80 is: 391,656.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,644.80 : 496,408.80 = 261,660.80 : x
  2. Step 2: Convert to fraction form
    331,644.80/496,408.80 = 261,660.80/x
  3. Step 3: Cross multiply
    331,644.80x = 496,408.80 × 261,660.80
  4. Step 4: Simplify right side
    331,644.80x = 129,890,723,735.04
  5. Step 5: Solve for x
    x = 129,890,723,735.04/331,644.80
  6. Step 6: Final answer
    x = 391,656.14

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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.