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Finding the Fourth Proportional to 391,246.50, 585,912.63 and 353,380.86

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Solution

The fourth proportional to 391,246.50, 585,912.63 and 353,380.86 is: 529,206.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,246.50 : 585,912.63 = 353,380.86 : x
  2. Step 2: Convert to fraction form
    391,246.50/585,912.63 = 353,380.86/x
  3. Step 3: Cross multiply
    391,246.50x = 585,912.63 × 353,380.86
  4. Step 4: Simplify right side
    391,246.50x = 207,050,309,074.26
  5. Step 5: Solve for x
    x = 207,050,309,074.26/391,246.50
  6. Step 6: Final answer
    x = 529,206.80

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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.