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Finding the Fourth Proportional to 403.26, 552.87 and 395.97

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Solution

The fourth proportional to 403.26, 552.87 and 395.97 is: 542.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.26 : 552.87 = 395.97 : x
  2. Step 2: Convert to fraction form
    403.26/552.87 = 395.97/x
  3. Step 3: Cross multiply
    403.26x = 552.87 × 395.97
  4. Step 4: Simplify right side
    403.26x = 218,919.93
  5. Step 5: Solve for x
    x = 218,919.93/403.26
  6. Step 6: Final answer
    x = 542.88

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.