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Finding the Fourth Proportional to 441.90, 662.85 and 198.42

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Solution

The fourth proportional to 441.90, 662.85 and 198.42 is: 297.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.90 : 662.85 = 198.42 : x
  2. Step 2: Convert to fraction form
    441.90/662.85 = 198.42/x
  3. Step 3: Cross multiply
    441.90x = 662.85 × 198.42
  4. Step 4: Simplify right side
    441.90x = 131,522.70
  5. Step 5: Solve for x
    x = 131,522.70/441.90
  6. Step 6: Final answer
    x = 297.63

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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.