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Finding the Fourth Proportional to 311.37, 467.45 and 260.66

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Solution

The fourth proportional to 311.37, 467.45 and 260.66 is: 391.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.37 : 467.45 = 260.66 : x
  2. Step 2: Convert to fraction form
    311.37/467.45 = 260.66/x
  3. Step 3: Cross multiply
    311.37x = 467.45 × 260.66
  4. Step 4: Simplify right side
    311.37x = 121,841.88
  5. Step 5: Solve for x
    x = 121,841.88/311.37
  6. Step 6: Final answer
    x = 391.31

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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.