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Finding the Fourth Proportional to 331,267.80, 496,658.70 and 131,489.40

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Solution

The fourth proportional to 331,267.80, 496,658.70 and 131,489.40 is: 197,137.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,267.80 : 496,658.70 = 131,489.40 : x
  2. Step 2: Convert to fraction form
    331,267.80/496,658.70 = 131,489.40/x
  3. Step 3: Cross multiply
    331,267.80x = 496,658.70 × 131,489.40
  4. Step 4: Simplify right side
    331,267.80x = 65,305,354,467.78
  5. Step 5: Solve for x
    x = 65,305,354,467.78/331,267.80
  6. Step 6: Final answer
    x = 197,137.65

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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.