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Finding the Fourth Proportional to 394,915.20, 592,761.60 and 195,460.80

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Solution

The fourth proportional to 394,915.20, 592,761.60 and 195,460.80 is: 293,383.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,915.20 : 592,761.60 = 195,460.80 : x
  2. Step 2: Convert to fraction form
    394,915.20/592,761.60 = 195,460.80/x
  3. Step 3: Cross multiply
    394,915.20x = 592,761.60 × 195,460.80
  4. Step 4: Simplify right side
    394,915.20x = 115,861,656,545.28
  5. Step 5: Solve for x
    x = 115,861,656,545.28/394,915.20
  6. Step 6: Final answer
    x = 293,383.63

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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.