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Finding the Fourth Proportional to 248.05, 371.62 and 220.71

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Solution

The fourth proportional to 248.05, 371.62 and 220.71 is: 330.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.05 : 371.62 = 220.71 : x
  2. Step 2: Convert to fraction form
    248.05/371.62 = 220.71/x
  3. Step 3: Cross multiply
    248.05x = 371.62 × 220.71
  4. Step 4: Simplify right side
    248.05x = 82,019.70
  5. Step 5: Solve for x
    x = 82,019.70/248.05
  6. Step 6: Final answer
    x = 330.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.