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Finding the Fourth Proportional to 408,889.60, 613,363.20 and 231,481.60

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Solution

The fourth proportional to 408,889.60, 613,363.20 and 231,481.60 is: 347,238.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,889.60 : 613,363.20 = 231,481.60 : x
  2. Step 2: Convert to fraction form
    408,889.60/613,363.20 = 231,481.60/x
  3. Step 3: Cross multiply
    408,889.60x = 613,363.20 × 231,481.60
  4. Step 4: Simplify right side
    408,889.60x = 141,982,294,917.12
  5. Step 5: Solve for x
    x = 141,982,294,917.12/408,889.60
  6. Step 6: Final answer
    x = 347,238.70

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1.5x scale

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.