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Finding the Fourth Proportional to 308.56, 425.85 and 177.61

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Solution

The fourth proportional to 308.56, 425.85 and 177.61 is: 245.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.56 : 425.85 = 177.61 : x
  2. Step 2: Convert to fraction form
    308.56/425.85 = 177.61/x
  3. Step 3: Cross multiply
    308.56x = 425.85 × 177.61
  4. Step 4: Simplify right side
    308.56x = 75,635.22
  5. Step 5: Solve for x
    x = 75,635.22/308.56
  6. Step 6: Final answer
    x = 245.12

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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.