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Finding the Fourth Proportional to 6.13, 8.45 and 3.97

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Solution

The fourth proportional to 6.13, 8.45 and 3.97 is: 5.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.13 : 8.45 = 3.97 : x
  2. Step 2: Convert to fraction form
    6.13/8.45 = 3.97/x
  3. Step 3: Cross multiply
    6.13x = 8.45 × 3.97
  4. Step 4: Simplify right side
    6.13x = 33.58
  5. Step 5: Solve for x
    x = 33.58/6.13
  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.