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Finding the Fourth Proportional to 722,251.31, 996,705.89 and 399,961.01

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Solution

The fourth proportional to 722,251.31, 996,705.89 and 399,961.01 is: 551,945.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,251.31 : 996,705.89 = 399,961.01 : x
  2. Step 2: Convert to fraction form
    722,251.31/996,705.89 = 399,961.01/x
  3. Step 3: Cross multiply
    722,251.31x = 996,705.89 × 399,961.01
  4. Step 4: Simplify right side
    722,251.31x = 398,643,487,454.01
  5. Step 5: Solve for x
    x = 398,643,487,454.01/722,251.31
  6. Step 6: Final answer
    x = 551,945.68

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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.