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Finding the Fourth Proportional to 331,057.40, 496,586.10 and 131,425.40

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Solution

The fourth proportional to 331,057.40, 496,586.10 and 131,425.40 is: 197,138.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,057.40 : 496,586.10 = 131,425.40 : x
  2. Step 2: Convert to fraction form
    331,057.40/496,586.10 = 131,425.40/x
  3. Step 3: Cross multiply
    331,057.40x = 496,586.10 × 131,425.40
  4. Step 4: Simplify right side
    331,057.40x = 65,264,026,826.94
  5. Step 5: Solve for x
    x = 65,264,026,826.94/331,057.40
  6. Step 6: Final answer
    x = 197,138.10

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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.