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Finding the Fourth Proportional to 663,940.40, 996,906.89 and 379,951.61

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Solution

The fourth proportional to 663,940.40, 996,906.89 and 379,951.61 is: 570,497.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,940.40 : 996,906.89 = 379,951.61 : x
  2. Step 2: Convert to fraction form
    663,940.40/996,906.89 = 379,951.61/x
  3. Step 3: Cross multiply
    663,940.40x = 996,906.89 × 379,951.61
  4. Step 4: Simplify right side
    663,940.40x = 378,776,379,448.54
  5. Step 5: Solve for x
    x = 378,776,379,448.54/663,940.40
  6. Step 6: Final answer
    x = 570,497.57

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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.