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Finding the Fourth Proportional to 248.81, 372.74 and 221.46

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Solution

The fourth proportional to 248.81, 372.74 and 221.46 is: 331.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.81 : 372.74 = 221.46 : x
  2. Step 2: Convert to fraction form
    248.81/372.74 = 221.46/x
  3. Step 3: Cross multiply
    248.81x = 372.74 × 221.46
  4. Step 4: Simplify right side
    248.81x = 82,545.89
  5. Step 5: Solve for x
    x = 82,545.89/248.81
  6. Step 6: Final answer
    x = 331.77

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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.