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Finding the Fourth Proportional to 454.26, 681.12 and 248.70

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Solution

The fourth proportional to 454.26, 681.12 and 248.70 is: 372.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.26 : 681.12 = 248.70 : x
  2. Step 2: Convert to fraction form
    454.26/681.12 = 248.70/x
  3. Step 3: Cross multiply
    454.26x = 681.12 × 248.70
  4. Step 4: Simplify right side
    454.26x = 169,394.54
  5. Step 5: Solve for x
    x = 169,394.54/454.26
  6. Step 6: Final answer
    x = 372.90

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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.