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Finding the Fourth Proportional to 412,821.70, 619,232.55 and 132,367.30

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Solution

The fourth proportional to 412,821.70, 619,232.55 and 132,367.30 is: 198,550.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,821.70 : 619,232.55 = 132,367.30 : x
  2. Step 2: Convert to fraction form
    412,821.70/619,232.55 = 132,367.30/x
  3. Step 3: Cross multiply
    412,821.70x = 619,232.55 × 132,367.30
  4. Step 4: Simplify right side
    412,821.70x = 81,966,140,715.62
  5. Step 5: Solve for x
    x = 81,966,140,715.62/412,821.70
  6. Step 6: Final answer
    x = 198,550.95

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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.