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Finding the Fourth Proportional to 310.48, 428.46 and 179.49

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Solution

The fourth proportional to 310.48, 428.46 and 179.49 is: 247.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.48 : 428.46 = 179.49 : x
  2. Step 2: Convert to fraction form
    310.48/428.46 = 179.49/x
  3. Step 3: Cross multiply
    310.48x = 428.46 × 179.49
  4. Step 4: Simplify right side
    310.48x = 76,904.29
  5. Step 5: Solve for x
    x = 76,904.29/310.48
  6. Step 6: Final answer
    x = 247.69

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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.