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Finding the Fourth Proportional to 207.78, 286.84 and 171.02

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Solution

The fourth proportional to 207.78, 286.84 and 171.02 is: 236.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.78 : 286.84 = 171.02 : x
  2. Step 2: Convert to fraction form
    207.78/286.84 = 171.02/x
  3. Step 3: Cross multiply
    207.78x = 286.84 × 171.02
  4. Step 4: Simplify right side
    207.78x = 49,055.38
  5. Step 5: Solve for x
    x = 49,055.38/207.78
  6. Step 6: Final answer
    x = 236.09

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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.