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Finding the Fourth Proportional to 6.85, 9.45 and 3.97

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Solution

The fourth proportional to 6.85, 9.45 and 3.97 is: 5.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.85 : 9.45 = 3.97 : x
  2. Step 2: Convert to fraction form
    6.85/9.45 = 3.97/x
  3. Step 3: Cross multiply
    6.85x = 9.45 × 3.97
  4. Step 4: Simplify right side
    6.85x = 37.50
  5. Step 5: Solve for x
    x = 37.50/6.85
  6. Step 6: Final answer
    x = 5.48

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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.