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Finding the Fourth Proportional to 394,229.80, 591,344.70 and 245,416.60

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Solution

The fourth proportional to 394,229.80, 591,344.70 and 245,416.60 is: 368,124.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,229.80 : 591,344.70 = 245,416.60 : x
  2. Step 2: Convert to fraction form
    394,229.80/591,344.70 = 245,416.60/x
  3. Step 3: Cross multiply
    394,229.80x = 591,344.70 × 245,416.60
  4. Step 4: Simplify right side
    394,229.80x = 145,125,805,702.02
  5. Step 5: Solve for x
    x = 145,125,805,702.02/394,229.80
  6. Step 6: Final answer
    x = 368,124.90

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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.