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Finding the Fourth Proportional to 207.98, 286.95 and 134.21

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Solution

The fourth proportional to 207.98, 286.95 and 134.21 is: 185.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.98 : 286.95 = 134.21 : x
  2. Step 2: Convert to fraction form
    207.98/286.95 = 134.21/x
  3. Step 3: Cross multiply
    207.98x = 286.95 × 134.21
  4. Step 4: Simplify right side
    207.98x = 38,510.12
  5. Step 5: Solve for x
    x = 38,510.12/207.98
  6. Step 6: Final answer
    x = 185.17

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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.