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Finding the Fourth Proportional to 310.56, 428.54 and 179.57

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Solution

The fourth proportional to 310.56, 428.54 and 179.57 is: 247.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.56 : 428.54 = 179.57 : x
  2. Step 2: Convert to fraction form
    310.56/428.54 = 179.57/x
  3. Step 3: Cross multiply
    310.56x = 428.54 × 179.57
  4. Step 4: Simplify right side
    310.56x = 76,951.23
  5. Step 5: Solve for x
    x = 76,951.23/310.56
  6. Step 6: Final answer
    x = 247.78

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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.