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Finding the Fourth Proportional to 235.56, 352.38 and 221.74

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Solution

The fourth proportional to 235.56, 352.38 and 221.74 is: 331.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.56 : 352.38 = 221.74 : x
  2. Step 2: Convert to fraction form
    235.56/352.38 = 221.74/x
  3. Step 3: Cross multiply
    235.56x = 352.38 × 221.74
  4. Step 4: Simplify right side
    235.56x = 78,136.74
  5. Step 5: Solve for x
    x = 78,136.74/235.56
  6. Step 6: Final answer
    x = 331.71

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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.