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Finding the Fourth Proportional to 625,711.10, 937,493.91 and 420,160.43

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Solution

The fourth proportional to 625,711.10, 937,493.91 and 420,160.43 is: 629,520.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,711.10 : 937,493.91 = 420,160.43 : x
  2. Step 2: Convert to fraction form
    625,711.10/937,493.91 = 420,160.43/x
  3. Step 3: Cross multiply
    625,711.10x = 937,493.91 × 420,160.43
  4. Step 4: Simplify right side
    625,711.10x = 393,897,839,660.51
  5. Step 5: Solve for x
    x = 393,897,839,660.51/625,711.10
  6. Step 6: Final answer
    x = 629,520.31

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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.