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Finding the Fourth Proportional to 457.11, 685.46 and 197.23

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Solution

The fourth proportional to 457.11, 685.46 and 197.23 is: 295.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.11 : 685.46 = 197.23 : x
  2. Step 2: Convert to fraction form
    457.11/685.46 = 197.23/x
  3. Step 3: Cross multiply
    457.11x = 685.46 × 197.23
  4. Step 4: Simplify right side
    457.11x = 135,193.28
  5. Step 5: Solve for x
    x = 135,193.28/457.11
  6. Step 6: Final answer
    x = 295.76

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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.