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Finding the Fourth Proportional to 204.20, 281.24 and 188.80

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Solution

The fourth proportional to 204.20, 281.24 and 188.80 is: 260.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.20 : 281.24 = 188.80 : x
  2. Step 2: Convert to fraction form
    204.20/281.24 = 188.80/x
  3. Step 3: Cross multiply
    204.20x = 281.24 × 188.80
  4. Step 4: Simplify right side
    204.20x = 53,098.11
  5. Step 5: Solve for x
    x = 53,098.11/204.20
  6. Step 6: Final answer
    x = 260.03

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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.