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Finding the Fourth Proportional to 207.91, 286.86 and 134.20

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Solution

The fourth proportional to 207.91, 286.86 and 134.20 is: 185.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.91 : 286.86 = 134.20 : x
  2. Step 2: Convert to fraction form
    207.91/286.86 = 134.20/x
  3. Step 3: Cross multiply
    207.91x = 286.86 × 134.20
  4. Step 4: Simplify right side
    207.91x = 38,496.61
  5. Step 5: Solve for x
    x = 38,496.61/207.91
  6. Step 6: Final answer
    x = 185.16

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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.