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Finding the Fourth Proportional to 311.46, 467.39 and 119.08

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Solution

The fourth proportional to 311.46, 467.39 and 119.08 is: 178.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.46 : 467.39 = 119.08 : x
  2. Step 2: Convert to fraction form
    311.46/467.39 = 119.08/x
  3. Step 3: Cross multiply
    311.46x = 467.39 × 119.08
  4. Step 4: Simplify right side
    311.46x = 55,656.80
  5. Step 5: Solve for x
    x = 55,656.80/311.46
  6. Step 6: Final answer
    x = 178.70

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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.