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Finding the Fourth Proportional to 442.24, 662.95 and 198.64

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Solution

The fourth proportional to 442.24, 662.95 and 198.64 is: 297.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.24 : 662.95 = 198.64 : x
  2. Step 2: Convert to fraction form
    442.24/662.95 = 198.64/x
  3. Step 3: Cross multiply
    442.24x = 662.95 × 198.64
  4. Step 4: Simplify right side
    442.24x = 131,688.39
  5. Step 5: Solve for x
    x = 131,688.39/442.24
  6. Step 6: Final answer
    x = 297.78

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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.