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Finding the Fourth Proportional to 311.42, 467.15 and 242.81

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Solution

The fourth proportional to 311.42, 467.15 and 242.81 is: 364.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.42 : 467.15 = 242.81 : x
  2. Step 2: Convert to fraction form
    311.42/467.15 = 242.81/x
  3. Step 3: Cross multiply
    311.42x = 467.15 × 242.81
  4. Step 4: Simplify right side
    311.42x = 113,425.14
  5. Step 5: Solve for x
    x = 113,425.14/311.42
  6. Step 6: Final answer
    x = 364.23

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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.