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Finding the Fourth Proportional to 248.29, 372.41 and 85.97

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Solution

The fourth proportional to 248.29, 372.41 and 85.97 is: 128.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.29 : 372.41 = 85.97 : x
  2. Step 2: Convert to fraction form
    248.29/372.41 = 85.97/x
  3. Step 3: Cross multiply
    248.29x = 372.41 × 85.97
  4. Step 4: Simplify right side
    248.29x = 32,014.44
  5. Step 5: Solve for x
    x = 32,014.44/248.29
  6. Step 6: Final answer
    x = 128.94

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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.