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Finding the Fourth Proportional to 663,132.90, 994,116.15 and 396,999.30

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Solution

The fourth proportional to 663,132.90, 994,116.15 and 396,999.30 is: 595,149.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,132.90 : 994,116.15 = 396,999.30 : x
  2. Step 2: Convert to fraction form
    663,132.90/994,116.15 = 396,999.30/x
  3. Step 3: Cross multiply
    663,132.90x = 994,116.15 × 396,999.30
  4. Step 4: Simplify right side
    663,132.90x = 394,663,415,668.70
  5. Step 5: Solve for x
    x = 394,663,415,668.70/663,132.90
  6. Step 6: Final answer
    x = 595,149.80

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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.