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Finding the Fourth Proportional to 442.03, 663.20 and 198.73

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Solution

The fourth proportional to 442.03, 663.20 and 198.73 is: 298.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.03 : 663.20 = 198.73 : x
  2. Step 2: Convert to fraction form
    442.03/663.20 = 198.73/x
  3. Step 3: Cross multiply
    442.03x = 663.20 × 198.73
  4. Step 4: Simplify right side
    442.03x = 131,797.74
  5. Step 5: Solve for x
    x = 131,797.74/442.03
  6. Step 6: Final answer
    x = 298.16

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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.