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Finding the Fourth Proportional to 204.80, 282.62 and 111.54

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Solution

The fourth proportional to 204.80, 282.62 and 111.54 is: 153.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.80 : 282.62 = 111.54 : x
  2. Step 2: Convert to fraction form
    204.80/282.62 = 111.54/x
  3. Step 3: Cross multiply
    204.80x = 282.62 × 111.54
  4. Step 4: Simplify right side
    204.80x = 31,522.88
  5. Step 5: Solve for x
    x = 31,522.88/204.80
  6. Step 6: Final answer
    x = 153.92

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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.