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Finding the Fourth Proportional to 297.97, 446.72 and 206.39

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Solution

The fourth proportional to 297.97, 446.72 and 206.39 is: 309.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.97 : 446.72 = 206.39 : x
  2. Step 2: Convert to fraction form
    297.97/446.72 = 206.39/x
  3. Step 3: Cross multiply
    297.97x = 446.72 × 206.39
  4. Step 4: Simplify right side
    297.97x = 92,198.63
  5. Step 5: Solve for x
    x = 92,198.63/297.97
  6. Step 6: Final answer
    x = 309.43

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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.