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Finding the Fourth Proportional to 311.20, 467.10 and 265.60

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Solution

The fourth proportional to 311.20, 467.10 and 265.60 is: 398.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.20 : 467.10 = 265.60 : x
  2. Step 2: Convert to fraction form
    311.20/467.10 = 265.60/x
  3. Step 3: Cross multiply
    311.20x = 467.10 × 265.60
  4. Step 4: Simplify right side
    311.20x = 124,061.76
  5. Step 5: Solve for x
    x = 124,061.76/311.20
  6. Step 6: Final answer
    x = 398.66

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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.