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Finding the Fourth Proportional to 399,333.42, 551,081.27 and 218,046.92

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Solution

The fourth proportional to 399,333.42, 551,081.27 and 218,046.92 is: 300,905.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,333.42 : 551,081.27 = 218,046.92 : x
  2. Step 2: Convert to fraction form
    399,333.42/551,081.27 = 218,046.92/x
  3. Step 3: Cross multiply
    399,333.42x = 551,081.27 × 218,046.92
  4. Step 4: Simplify right side
    399,333.42x = 120,161,571,382.90
  5. Step 5: Solve for x
    x = 120,161,571,382.90/399,333.42
  6. Step 6: Final answer
    x = 300,905.37

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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.