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Finding the Fourth Proportional to 343,425.60, 515,138.40 and 231,451.20

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Solution

The fourth proportional to 343,425.60, 515,138.40 and 231,451.20 is: 347,176.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,425.60 : 515,138.40 = 231,451.20 : x
  2. Step 2: Convert to fraction form
    343,425.60/515,138.40 = 231,451.20/x
  3. Step 3: Cross multiply
    343,425.60x = 515,138.40 × 231,451.20
  4. Step 4: Simplify right side
    343,425.60x = 119,229,400,846.08
  5. Step 5: Solve for x
    x = 119,229,400,846.08/343,425.60
  6. Step 6: Final answer
    x = 347,176.80

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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.