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Finding the Fourth Proportional to 722,203.78, 996,628.96 and 399,906.96

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Solution

The fourth proportional to 722,203.78, 996,628.96 and 399,906.96 is: 551,864.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,203.78 : 996,628.96 = 399,906.96 : x
  2. Step 2: Convert to fraction form
    722,203.78/996,628.96 = 399,906.96/x
  3. Step 3: Cross multiply
    722,203.78x = 996,628.96 × 399,906.96
  4. Step 4: Simplify right side
    722,203.78x = 398,558,854,404.09
  5. Step 5: Solve for x
    x = 398,558,854,404.09/722,203.78
  6. Step 6: Final answer
    x = 551,864.81

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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.