Home / 391,130.20-587,408.10-342,141.40

Finding the Fourth Proportional to 391,130.20, 587,408.10 and 342,141.40

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Solution

The fourth proportional to 391,130.20, 587,408.10 and 342,141.40 is: 513,835.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,130.20 : 587,408.10 = 342,141.40 : x
  2. Step 2: Convert to fraction form
    391,130.20/587,408.10 = 342,141.40/x
  3. Step 3: Cross multiply
    391,130.20x = 587,408.10 × 342,141.40
  4. Step 4: Simplify right side
    391,130.20x = 200,976,629,705.34
  5. Step 5: Solve for x
    x = 200,976,629,705.34/391,130.20
  6. Step 6: Final answer
    x = 513,835.62

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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.