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Finding the Fourth Proportional to 442.06, 662.88 and 133.85

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Solution

The fourth proportional to 442.06, 662.88 and 133.85 is: 200.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.06 : 662.88 = 133.85 : x
  2. Step 2: Convert to fraction form
    442.06/662.88 = 133.85/x
  3. Step 3: Cross multiply
    442.06x = 662.88 × 133.85
  4. Step 4: Simplify right side
    442.06x = 88,728.65
  5. Step 5: Solve for x
    x = 88,728.65/442.06
  6. Step 6: Final answer
    x = 200.72

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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.