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Finding the Fourth Proportional to 308.96, 426.16 and 220.44

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Solution

The fourth proportional to 308.96, 426.16 and 220.44 is: 304.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.96 : 426.16 = 220.44 : x
  2. Step 2: Convert to fraction form
    308.96/426.16 = 220.44/x
  3. Step 3: Cross multiply
    308.96x = 426.16 × 220.44
  4. Step 4: Simplify right side
    308.96x = 93,942.71
  5. Step 5: Solve for x
    x = 93,942.71/308.96
  6. Step 6: Final answer
    x = 304.06

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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.