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Finding the Fourth Proportional to 391,795.80, 587,693.70 and 340,474.20

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Solution

The fourth proportional to 391,795.80, 587,693.70 and 340,474.20 is: 510,711.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,795.80 : 587,693.70 = 340,474.20 : x
  2. Step 2: Convert to fraction form
    391,795.80/587,693.70 = 340,474.20/x
  3. Step 3: Cross multiply
    391,795.80x = 587,693.70 × 340,474.20
  4. Step 4: Simplify right side
    391,795.80x = 200,094,542,352.54
  5. Step 5: Solve for x
    x = 200,094,542,352.54/391,795.80
  6. Step 6: Final answer
    x = 510,711.30

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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.