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Finding the Fourth Proportional to 248.62, 371.01 and 221.36

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Solution

The fourth proportional to 248.62, 371.01 and 221.36 is: 330.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.62 : 371.01 = 221.36 : x
  2. Step 2: Convert to fraction form
    248.62/371.01 = 221.36/x
  3. Step 3: Cross multiply
    248.62x = 371.01 × 221.36
  4. Step 4: Simplify right side
    248.62x = 82,126.77
  5. Step 5: Solve for x
    x = 82,126.77/248.62
  6. Step 6: Final answer
    x = 330.33

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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.