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Finding the Fourth Proportional to 207.38, 311.16 and 111.08

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Solution

The fourth proportional to 207.38, 311.16 and 111.08 is: 166.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.38 : 311.16 = 111.08 : x
  2. Step 2: Convert to fraction form
    207.38/311.16 = 111.08/x
  3. Step 3: Cross multiply
    207.38x = 311.16 × 111.08
  4. Step 4: Simplify right side
    207.38x = 34,563.65
  5. Step 5: Solve for x
    x = 34,563.65/207.38
  6. Step 6: Final answer
    x = 166.67

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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.