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Finding the Fourth Proportional to 286.15, 395.66 and 249.70

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Solution

The fourth proportional to 286.15, 395.66 and 249.70 is: 345.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.15 : 395.66 = 249.70 : x
  2. Step 2: Convert to fraction form
    286.15/395.66 = 249.70/x
  3. Step 3: Cross multiply
    286.15x = 395.66 × 249.70
  4. Step 4: Simplify right side
    286.15x = 98,796.30
  5. Step 5: Solve for x
    x = 98,796.30/286.15
  6. Step 6: Final answer
    x = 345.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.