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Finding the Fourth Proportional to 663,353.40, 994,446.90 and 397,219.80

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Solution

The fourth proportional to 663,353.40, 994,446.90 and 397,219.80 is: 595,480.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,353.40 : 994,446.90 = 397,219.80 : x
  2. Step 2: Convert to fraction form
    663,353.40/994,446.90 = 397,219.80/x
  3. Step 3: Cross multiply
    663,353.40x = 994,446.90 × 397,219.80
  4. Step 4: Simplify right side
    663,353.40x = 395,013,998,728.62
  5. Step 5: Solve for x
    x = 395,013,998,728.62/663,353.40
  6. Step 6: Final answer
    x = 595,480.48

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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.