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Finding the Fourth Proportional to 206.92, 285.61 and 119.61

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Solution

The fourth proportional to 206.92, 285.61 and 119.61 is: 165.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.92 : 285.61 = 119.61 : x
  2. Step 2: Convert to fraction form
    206.92/285.61 = 119.61/x
  3. Step 3: Cross multiply
    206.92x = 285.61 × 119.61
  4. Step 4: Simplify right side
    206.92x = 34,161.74
  5. Step 5: Solve for x
    x = 34,161.74/206.92
  6. Step 6: Final answer
    x = 165.10

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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.