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Finding the Fourth Proportional to 442.14, 662.96 and 133.92

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Solution

The fourth proportional to 442.14, 662.96 and 133.92 is: 200.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.14 : 662.96 = 133.92 : x
  2. Step 2: Convert to fraction form
    442.14/662.96 = 133.92/x
  3. Step 3: Cross multiply
    442.14x = 662.96 × 133.92
  4. Step 4: Simplify right side
    442.14x = 88,783.60
  5. Step 5: Solve for x
    x = 88,783.60/442.14
  6. Step 6: Final answer
    x = 200.80

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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.