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Finding the Fourth Proportional to 722,187.52, 996,591.36 and 399,872

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Solution

The fourth proportional to 722,187.52, 996,591.36 and 399,872 is: 551,808.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,187.52 : 996,591.36 = 399,872 : x
  2. Step 2: Convert to fraction form
    722,187.52/996,591.36 = 399,872/x
  3. Step 3: Cross multiply
    722,187.52x = 996,591.36 × 399,872
  4. Step 4: Simplify right side
    722,187.52x = 398,508,980,305.92
  5. Step 5: Solve for x
    x = 398,508,980,305.92/722,187.52
  6. Step 6: Final answer
    x = 551,808.18

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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.