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Finding the Fourth Proportional to 204.88, 282.74 and 112.88

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Solution

The fourth proportional to 204.88, 282.74 and 112.88 is: 155.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.88 : 282.74 = 112.88 : x
  2. Step 2: Convert to fraction form
    204.88/282.74 = 112.88/x
  3. Step 3: Cross multiply
    204.88x = 282.74 × 112.88
  4. Step 4: Simplify right side
    204.88x = 31,915.69
  5. Step 5: Solve for x
    x = 31,915.69/204.88
  6. Step 6: Final answer
    x = 155.78

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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.