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Finding the Fourth Proportional to 338.40, 467.39 and 268.70

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Solution

The fourth proportional to 338.40, 467.39 and 268.70 is: 371.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.40 : 467.39 = 268.70 : x
  2. Step 2: Convert to fraction form
    338.40/467.39 = 268.70/x
  3. Step 3: Cross multiply
    338.40x = 467.39 × 268.70
  4. Step 4: Simplify right side
    338.40x = 125,586.03
  5. Step 5: Solve for x
    x = 125,586.03/338.40
  6. Step 6: Final answer
    x = 371.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.