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Finding the Fourth Proportional to 234.79, 350.60 and 221.29

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Solution

The fourth proportional to 234.79, 350.60 and 221.29 is: 330.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.79 : 350.60 = 221.29 : x
  2. Step 2: Convert to fraction form
    234.79/350.60 = 221.29/x
  3. Step 3: Cross multiply
    234.79x = 350.60 × 221.29
  4. Step 4: Simplify right side
    234.79x = 77,584.27
  5. Step 5: Solve for x
    x = 77,584.27/234.79
  6. Step 6: Final answer
    x = 330.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.