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Finding the Fourth Proportional to 643,843.76, 888,614.42 and 371,862.77

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Solution

The fourth proportional to 643,843.76, 888,614.42 and 371,862.77 is: 513,234.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,843.76 : 888,614.42 = 371,862.77 : x
  2. Step 2: Convert to fraction form
    643,843.76/888,614.42 = 371,862.77/x
  3. Step 3: Cross multiply
    643,843.76x = 888,614.42 × 371,862.77
  4. Step 4: Simplify right side
    643,843.76x = 330,442,613,380.76
  5. Step 5: Solve for x
    x = 330,442,613,380.76/643,843.76
  6. Step 6: Final answer
    x = 513,234.17

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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.