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Finding the Fourth Proportional to 643,909.29, 888,578.37 and 353,519.43

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Solution

The fourth proportional to 643,909.29, 888,578.37 and 353,519.43 is: 487,847.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,909.29 : 888,578.37 = 353,519.43 : x
  2. Step 2: Convert to fraction form
    643,909.29/888,578.37 = 353,519.43/x
  3. Step 3: Cross multiply
    643,909.29x = 888,578.37 × 353,519.43
  4. Step 4: Simplify right side
    643,909.29x = 314,129,718,872.73
  5. Step 5: Solve for x
    x = 314,129,718,872.73/643,909.29
  6. Step 6: Final answer
    x = 487,847.78

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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.