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Finding the Fourth Proportional to 208.39, 310.36 and 205.96

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Solution

The fourth proportional to 208.39, 310.36 and 205.96 is: 306.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    208.39 : 310.36 = 205.96 : x
  2. Step 2: Convert to fraction form
    208.39/310.36 = 205.96/x
  3. Step 3: Cross multiply
    208.39x = 310.36 × 205.96
  4. Step 4: Simplify right side
    208.39x = 63,921.75
  5. Step 5: Solve for x
    x = 63,921.75/208.39
  6. Step 6: Final answer
    x = 306.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.