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Finding the Fourth Proportional to 397.08, 547.79 and 249.80

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Solution

The fourth proportional to 397.08, 547.79 and 249.80 is: 344.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.08 : 547.79 = 249.80 : x
  2. Step 2: Convert to fraction form
    397.08/547.79 = 249.80/x
  3. Step 3: Cross multiply
    397.08x = 547.79 × 249.80
  4. Step 4: Simplify right side
    397.08x = 136,833.95
  5. Step 5: Solve for x
    x = 136,833.95/397.08
  6. Step 6: Final answer
    x = 344.60

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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.