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Finding the Fourth Proportional to 391,600.45, 587,401.13 and 107,293.42

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Solution

The fourth proportional to 391,600.45, 587,401.13 and 107,293.42 is: 160,940.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,600.45 : 587,401.13 = 107,293.42 : x
  2. Step 2: Convert to fraction form
    391,600.45/587,401.13 = 107,293.42/x
  3. Step 3: Cross multiply
    391,600.45x = 587,401.13 × 107,293.42
  4. Step 4: Simplify right side
    391,600.45x = 63,024,276,149.56
  5. Step 5: Solve for x
    x = 63,024,276,149.56/391,600.45
  6. Step 6: Final answer
    x = 160,940.25

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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.