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Finding the Fourth Proportional to 235.34, 350.50 and 221.38

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Solution

The fourth proportional to 235.34, 350.50 and 221.38 is: 329.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.34 : 350.50 = 221.38 : x
  2. Step 2: Convert to fraction form
    235.34/350.50 = 221.38/x
  3. Step 3: Cross multiply
    235.34x = 350.50 × 221.38
  4. Step 4: Simplify right side
    235.34x = 77,593.69
  5. Step 5: Solve for x
    x = 77,593.69/235.34
  6. Step 6: Final answer
    x = 329.71

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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.