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Finding the Fourth Proportional to 206.99, 310.45 and 166.65

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Solution

The fourth proportional to 206.99, 310.45 and 166.65 is: 249.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    206.99 : 310.45 = 166.65 : x
  2. Step 2: Convert to fraction form
    206.99/310.45 = 166.65/x
  3. Step 3: Cross multiply
    206.99x = 310.45 × 166.65
  4. Step 4: Simplify right side
    206.99x = 51,736.49
  5. Step 5: Solve for x
    x = 51,736.49/206.99
  6. Step 6: Final answer
    x = 249.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.