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Finding the Fourth Proportional to 442,702.20, 660,600.50 and 394,989.30

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Solution

The fourth proportional to 442,702.20, 660,600.50 and 394,989.30 is: 589,403.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,702.20 : 660,600.50 = 394,989.30 : x
  2. Step 2: Convert to fraction form
    442,702.20/660,600.50 = 394,989.30/x
  3. Step 3: Cross multiply
    442,702.20x = 660,600.50 × 394,989.30
  4. Step 4: Simplify right side
    442,702.20x = 260,930,127,099.70
  5. Step 5: Solve for x
    x = 260,930,127,099.70/442,702.20
  6. Step 6: Final answer
    x = 589,403.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.