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Finding the Fourth Proportional to 442.26, 663.11 and 211.03

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Solution

The fourth proportional to 442.26, 663.11 and 211.03 is: 316.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.26 : 663.11 = 211.03 : x
  2. Step 2: Convert to fraction form
    442.26/663.11 = 211.03/x
  3. Step 3: Cross multiply
    442.26x = 663.11 × 211.03
  4. Step 4: Simplify right side
    442.26x = 139,934.18
  5. Step 5: Solve for x
    x = 139,934.18/442.26
  6. Step 6: Final answer
    x = 316.41

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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.