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Finding the Fourth Proportional to 308.96, 426.35 and 176.15

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Solution

The fourth proportional to 308.96, 426.35 and 176.15 is: 243.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.96 : 426.35 = 176.15 : x
  2. Step 2: Convert to fraction form
    308.96/426.35 = 176.15/x
  3. Step 3: Cross multiply
    308.96x = 426.35 × 176.15
  4. Step 4: Simplify right side
    308.96x = 75,098.54
  5. Step 5: Solve for x
    x = 75,098.54/308.96
  6. Step 6: Final answer
    x = 243.07

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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.