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Finding the Fourth Proportional to 311.81, 467.91 and 116.81

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Solution

The fourth proportional to 311.81, 467.91 and 116.81 is: 175.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.81 : 467.91 = 116.81 : x
  2. Step 2: Convert to fraction form
    311.81/467.91 = 116.81/x
  3. Step 3: Cross multiply
    311.81x = 467.91 × 116.81
  4. Step 4: Simplify right side
    311.81x = 54,654.23
  5. Step 5: Solve for x
    x = 54,654.23/311.81
  6. Step 6: Final answer
    x = 175.28

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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.