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Finding the Fourth Proportional to 722,176.28, 996,591.10 and 399,879.44

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Solution

The fourth proportional to 722,176.28, 996,591.10 and 399,879.44 is: 551,826.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,176.28 : 996,591.10 = 399,879.44 : x
  2. Step 2: Convert to fraction form
    722,176.28/996,591.10 = 399,879.44/x
  3. Step 3: Cross multiply
    722,176.28x = 996,591.10 × 399,879.44
  4. Step 4: Simplify right side
    722,176.28x = 398,516,290,976.98
  5. Step 5: Solve for x
    x = 398,516,290,976.98/722,176.28
  6. Step 6: Final answer
    x = 551,826.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.