Home / 391,132.20-587,411.10-342,143.40

Finding the Fourth Proportional to 391,132.20, 587,411.10 and 342,143.40

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Solution

The fourth proportional to 391,132.20, 587,411.10 and 342,143.40 is: 513,838.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,132.20 : 587,411.10 = 342,143.40 : x
  2. Step 2: Convert to fraction form
    391,132.20/587,411.10 = 342,143.40/x
  3. Step 3: Cross multiply
    391,132.20x = 587,411.10 × 342,143.40
  4. Step 4: Simplify right side
    391,132.20x = 200,978,830,951.74
  5. Step 5: Solve for x
    x = 200,978,830,951.74/391,132.20
  6. Step 6: Final answer
    x = 513,838.62

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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.