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Finding the Fourth Proportional to 639,808.73, 959,614.68 and 213,351.97

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Solution

The fourth proportional to 639,808.73, 959,614.68 and 213,351.97 is: 319,995.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,808.73 : 959,614.68 = 213,351.97 : x
  2. Step 2: Convert to fraction form
    639,808.73/959,614.68 = 213,351.97/x
  3. Step 3: Cross multiply
    639,808.73x = 959,614.68 × 213,351.97
  4. Step 4: Simplify right side
    639,808.73x = 204,735,682,418.92
  5. Step 5: Solve for x
    x = 204,735,682,418.92/639,808.73
  6. Step 6: Final answer
    x = 319,995.14

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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.