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Finding the Fourth Proportional to 235.21, 324.30 and 203.71

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Solution

The fourth proportional to 235.21, 324.30 and 203.71 is: 280.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.21 : 324.30 = 203.71 : x
  2. Step 2: Convert to fraction form
    235.21/324.30 = 203.71/x
  3. Step 3: Cross multiply
    235.21x = 324.30 × 203.71
  4. Step 4: Simplify right side
    235.21x = 66,063.15
  5. Step 5: Solve for x
    x = 66,063.15/235.21
  6. Step 6: Final answer
    x = 280.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.