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Finding the Fourth Proportional to 331,269.80, 496,661.70 and 131,491.40

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Solution

The fourth proportional to 331,269.80, 496,661.70 and 131,491.40 is: 197,140.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,269.80 : 496,661.70 = 131,491.40 : x
  2. Step 2: Convert to fraction form
    331,269.80/496,661.70 = 131,491.40/x
  3. Step 3: Cross multiply
    331,269.80x = 496,661.70 × 131,491.40
  4. Step 4: Simplify right side
    331,269.80x = 65,306,742,259.38
  5. Step 5: Solve for x
    x = 65,306,742,259.38/331,269.80
  6. Step 6: Final answer
    x = 197,140.65

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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.