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Finding the Fourth Proportional to 681.22, 1,020.88 and 248.14

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Solution

The fourth proportional to 681.22, 1,020.88 and 248.14 is: 371.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.22 : 1,020.88 = 248.14 : x
  2. Step 2: Convert to fraction form
    681.22/1,020.88 = 248.14/x
  3. Step 3: Cross multiply
    681.22x = 1,020.88 × 248.14
  4. Step 4: Simplify right side
    681.22x = 253,321.16
  5. Step 5: Solve for x
    x = 253,321.16/681.22
  6. Step 6: Final answer
    x = 371.86

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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.