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Finding the Fourth Proportional to 399,333.81, 551,081.79 and 218,047.29

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Solution

The fourth proportional to 399,333.81, 551,081.79 and 218,047.29 is: 300,905.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,333.81 : 551,081.79 = 218,047.29 : x
  2. Step 2: Convert to fraction form
    399,333.81/551,081.79 = 218,047.29/x
  3. Step 3: Cross multiply
    399,333.81x = 551,081.79 × 218,047.29
  4. Step 4: Simplify right side
    399,333.81x = 120,161,890,877.85
  5. Step 5: Solve for x
    x = 120,161,890,877.85/399,333.81
  6. Step 6: Final answer
    x = 300,905.88

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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.