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Finding the Fourth Proportional to 204.66, 280.62 and 198.72

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Solution

The fourth proportional to 204.66, 280.62 and 198.72 is: 272.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.66 : 280.62 = 198.72 : x
  2. Step 2: Convert to fraction form
    204.66/280.62 = 198.72/x
  3. Step 3: Cross multiply
    204.66x = 280.62 × 198.72
  4. Step 4: Simplify right side
    204.66x = 55,764.81
  5. Step 5: Solve for x
    x = 55,764.81/204.66
  6. Step 6: Final answer
    x = 272.48

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.