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Finding the Fourth Proportional to 442.34, 662.61 and 211.44

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Solution

The fourth proportional to 442.34, 662.61 and 211.44 is: 316.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.34 : 662.61 = 211.44 : x
  2. Step 2: Convert to fraction form
    442.34/662.61 = 211.44/x
  3. Step 3: Cross multiply
    442.34x = 662.61 × 211.44
  4. Step 4: Simplify right side
    442.34x = 140,102.26
  5. Step 5: Solve for x
    x = 140,102.26/442.34
  6. Step 6: Final answer
    x = 316.73

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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.