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Finding the Fourth Proportional to 722,125.74, 996,453.05 and 399,755.10

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Solution

The fourth proportional to 722,125.74, 996,453.05 and 399,755.10 is: 551,617.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,125.74 : 996,453.05 = 399,755.10 : x
  2. Step 2: Convert to fraction form
    722,125.74/996,453.05 = 399,755.10/x
  3. Step 3: Cross multiply
    722,125.74x = 996,453.05 × 399,755.10
  4. Step 4: Simplify right side
    722,125.74x = 398,337,186,649.28
  5. Step 5: Solve for x
    x = 398,337,186,649.28/722,125.74
  6. Step 6: Final answer
    x = 551,617.49

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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.