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Finding the Fourth Proportional to 457.31, 685.97 and 200.81

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Solution

The fourth proportional to 457.31, 685.97 and 200.81 is: 301.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.31 : 685.97 = 200.81 : x
  2. Step 2: Convert to fraction form
    457.31/685.97 = 200.81/x
  3. Step 3: Cross multiply
    457.31x = 685.97 × 200.81
  4. Step 4: Simplify right side
    457.31x = 137,751.10
  5. Step 5: Solve for x
    x = 137,751.10/457.31
  6. Step 6: Final answer
    x = 301.22

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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.