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Finding the Fourth Proportional to 259.27, 385.85 and 249.55

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Solution

The fourth proportional to 259.27, 385.85 and 249.55 is: 371.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.27 : 385.85 = 249.55 : x
  2. Step 2: Convert to fraction form
    259.27/385.85 = 249.55/x
  3. Step 3: Cross multiply
    259.27x = 385.85 × 249.55
  4. Step 4: Simplify right side
    259.27x = 96,287.12
  5. Step 5: Solve for x
    x = 96,287.12/259.27
  6. Step 6: Final answer
    x = 371.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.