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Finding the Fourth Proportional to 399,785.92, 551,717.26 and 218,493.87

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Solution

The fourth proportional to 399,785.92, 551,717.26 and 218,493.87 is: 301,528.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,785.92 : 551,717.26 = 218,493.87 : x
  2. Step 2: Convert to fraction form
    399,785.92/551,717.26 = 218,493.87/x
  3. Step 3: Cross multiply
    399,785.92x = 551,717.26 × 218,493.87
  4. Step 4: Simplify right side
    399,785.92x = 120,546,839,283.20
  5. Step 5: Solve for x
    x = 120,546,839,283.20/399,785.92
  6. Step 6: Final answer
    x = 301,528.48

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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.