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Finding the Fourth Proportional to 235.48, 324.20 and 204.80

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Solution

The fourth proportional to 235.48, 324.20 and 204.80 is: 281.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    235.48 : 324.20 = 204.80 : x
  2. Step 2: Convert to fraction form
    235.48/324.20 = 204.80/x
  3. Step 3: Cross multiply
    235.48x = 324.20 × 204.80
  4. Step 4: Simplify right side
    235.48x = 66,396.16
  5. Step 5: Solve for x
    x = 66,396.16/235.48
  6. Step 6: Final answer
    x = 281.96

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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.