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Finding the Fourth Proportional to 442.41, 663.48 and 211.29

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Solution

The fourth proportional to 442.41, 663.48 and 211.29 is: 316.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.41 : 663.48 = 211.29 : x
  2. Step 2: Convert to fraction form
    442.41/663.48 = 211.29/x
  3. Step 3: Cross multiply
    442.41x = 663.48 × 211.29
  4. Step 4: Simplify right side
    442.41x = 140,186.69
  5. Step 5: Solve for x
    x = 140,186.69/442.41
  6. Step 6: Final answer
    x = 316.87

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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.