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Finding the Fourth Proportional to 248.94, 371.45 and 221.54

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Solution

The fourth proportional to 248.94, 371.45 and 221.54 is: 330.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.94 : 371.45 = 221.54 : x
  2. Step 2: Convert to fraction form
    248.94/371.45 = 221.54/x
  3. Step 3: Cross multiply
    248.94x = 371.45 × 221.54
  4. Step 4: Simplify right side
    248.94x = 82,289.73
  5. Step 5: Solve for x
    x = 82,289.73/248.94
  6. Step 6: Final answer
    x = 330.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.