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Finding the Fourth Proportional to 207.88, 286.87 and 120.53

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Solution

The fourth proportional to 207.88, 286.87 and 120.53 is: 166.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.88 : 286.87 = 120.53 : x
  2. Step 2: Convert to fraction form
    207.88/286.87 = 120.53/x
  3. Step 3: Cross multiply
    207.88x = 286.87 × 120.53
  4. Step 4: Simplify right side
    207.88x = 34,576.44
  5. Step 5: Solve for x
    x = 34,576.44/207.88
  6. Step 6: Final answer
    x = 166.33

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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.