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Finding the Fourth Proportional to 338.66, 467.28 and 198.75

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Solution

The fourth proportional to 338.66, 467.28 and 198.75 is: 274.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.66 : 467.28 = 198.75 : x
  2. Step 2: Convert to fraction form
    338.66/467.28 = 198.75/x
  3. Step 3: Cross multiply
    338.66x = 467.28 × 198.75
  4. Step 4: Simplify right side
    338.66x = 92,871.90
  5. Step 5: Solve for x
    x = 92,871.90/338.66
  6. Step 6: Final answer
    x = 274.24

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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.