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Finding the Fourth Proportional to 204.41, 281.83 and 138.80

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Solution

The fourth proportional to 204.41, 281.83 and 138.80 is: 191.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.41 : 281.83 = 138.80 : x
  2. Step 2: Convert to fraction form
    204.41/281.83 = 138.80/x
  3. Step 3: Cross multiply
    204.41x = 281.83 × 138.80
  4. Step 4: Simplify right side
    204.41x = 39,117.31
  5. Step 5: Solve for x
    x = 39,117.31/204.41
  6. Step 6: Final answer
    x = 191.37

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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.