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Finding the Fourth Proportional to 331,215.80, 496,580.70 and 131,437.40

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Solution

The fourth proportional to 331,215.80, 496,580.70 and 131,437.40 is: 197,059.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,215.80 : 496,580.70 = 131,437.40 : x
  2. Step 2: Convert to fraction form
    331,215.80/496,580.70 = 131,437.40/x
  3. Step 3: Cross multiply
    331,215.80x = 496,580.70 × 131,437.40
  4. Step 4: Simplify right side
    331,215.80x = 65,269,276,098.18
  5. Step 5: Solve for x
    x = 65,269,276,098.18/331,215.80
  6. Step 6: Final answer
    x = 197,059.67

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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.