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Finding the Fourth Proportional to 204.58, 282.27 and 138.97

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Solution

The fourth proportional to 204.58, 282.27 and 138.97 is: 191.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.58 : 282.27 = 138.97 : x
  2. Step 2: Convert to fraction form
    204.58/282.27 = 138.97/x
  3. Step 3: Cross multiply
    204.58x = 282.27 × 138.97
  4. Step 4: Simplify right side
    204.58x = 39,227.06
  5. Step 5: Solve for x
    x = 39,227.06/204.58
  6. Step 6: Final answer
    x = 191.74

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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.