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Finding the Fourth Proportional to 393,855.31, 590,906.89 and 140,963.38

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Solution

The fourth proportional to 393,855.31, 590,906.89 and 140,963.38 is: 211,489.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,855.31 : 590,906.89 = 140,963.38 : x
  2. Step 2: Convert to fraction form
    393,855.31/590,906.89 = 140,963.38/x
  3. Step 3: Cross multiply
    393,855.31x = 590,906.89 × 140,963.38
  4. Step 4: Simplify right side
    393,855.31x = 83,296,232,479.69
  5. Step 5: Solve for x
    x = 83,296,232,479.69/393,855.31
  6. Step 6: Final answer
    x = 211,489.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.