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Finding the Fourth Proportional to 206.19, 284.49 and 118.85

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Solution

The fourth proportional to 206.19, 284.49 and 118.85 is: 163.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.19 : 284.49 = 118.85 : x
  2. Step 2: Convert to fraction form
    206.19/284.49 = 118.85/x
  3. Step 3: Cross multiply
    206.19x = 284.49 × 118.85
  4. Step 4: Simplify right side
    206.19x = 33,810.21
  5. Step 5: Solve for x
    x = 33,810.21/206.19
  6. Step 6: Final answer
    x = 163.98

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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.