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Finding the Fourth Proportional to 311.36, 467.07 and 138.08

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Solution

The fourth proportional to 311.36, 467.07 and 138.08 is: 207.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.36 : 467.07 = 138.08 : x
  2. Step 2: Convert to fraction form
    311.36/467.07 = 138.08/x
  3. Step 3: Cross multiply
    311.36x = 467.07 × 138.08
  4. Step 4: Simplify right side
    311.36x = 64,493.03
  5. Step 5: Solve for x
    x = 64,493.03/311.36
  6. Step 6: Final answer
    x = 207.13

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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.