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Finding the Fourth Proportional to 286.71, 395.42 and 207.87

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Solution

The fourth proportional to 286.71, 395.42 and 207.87 is: 286.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.71 : 395.42 = 207.87 : x
  2. Step 2: Convert to fraction form
    286.71/395.42 = 207.87/x
  3. Step 3: Cross multiply
    286.71x = 395.42 × 207.87
  4. Step 4: Simplify right side
    286.71x = 82,195.96
  5. Step 5: Solve for x
    x = 82,195.96/286.71
  6. Step 6: Final answer
    x = 286.69

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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.