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Finding the Fourth Proportional to 722,046.28, 996,490.70 and 399,756.36

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Solution

The fourth proportional to 722,046.28, 996,490.70 and 399,756.36 is: 551,700.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,046.28 : 996,490.70 = 399,756.36 : x
  2. Step 2: Convert to fraction form
    722,046.28/996,490.70 = 399,756.36/x
  3. Step 3: Cross multiply
    722,046.28x = 996,490.70 × 399,756.36
  4. Step 4: Simplify right side
    722,046.28x = 398,353,500,491.63
  5. Step 5: Solve for x
    x = 398,353,500,491.63/722,046.28
  6. Step 6: Final answer
    x = 551,700.79

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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.