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Finding the Fourth Proportional to 308.86, 426.19 and 204.17

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Solution

The fourth proportional to 308.86, 426.19 and 204.17 is: 281.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.86 : 426.19 = 204.17 : x
  2. Step 2: Convert to fraction form
    308.86/426.19 = 204.17/x
  3. Step 3: Cross multiply
    308.86x = 426.19 × 204.17
  4. Step 4: Simplify right side
    308.86x = 87,012.06
  5. Step 5: Solve for x
    x = 87,012.06/308.86
  6. Step 6: Final answer
    x = 281.72

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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.