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Finding the Fourth Proportional to 722,178.24, 996,593.76 and 399,881.40

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Solution

The fourth proportional to 722,178.24, 996,593.76 and 399,881.40 is: 551,829.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,178.24 : 996,593.76 = 399,881.40 : x
  2. Step 2: Convert to fraction form
    722,178.24/996,593.76 = 399,881.40/x
  3. Step 3: Cross multiply
    722,178.24x = 996,593.76 × 399,881.40
  4. Step 4: Simplify right side
    722,178.24x = 398,519,300,997.69
  5. Step 5: Solve for x
    x = 398,519,300,997.69/722,178.24
  6. Step 6: Final answer
    x = 551,829.56

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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.