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Finding the Fourth Proportional to 621,757.91, 857,964.63 and 349,819.79

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Solution

The fourth proportional to 621,757.91, 857,964.63 and 349,819.79 is: 482,716.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,757.91 : 857,964.63 = 349,819.79 : x
  2. Step 2: Convert to fraction form
    621,757.91/857,964.63 = 349,819.79/x
  3. Step 3: Cross multiply
    621,757.91x = 857,964.63 × 349,819.79
  4. Step 4: Simplify right side
    621,757.91x = 300,133,002,404.21
  5. Step 5: Solve for x
    x = 300,133,002,404.21/621,757.91
  6. Step 6: Final answer
    x = 482,716.83

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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.