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Finding the Fourth Proportional to 6.89, 10.34 and 3.88

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Solution

The fourth proportional to 6.89, 10.34 and 3.88 is: 5.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.89 : 10.34 = 3.88 : x
  2. Step 2: Convert to fraction form
    6.89/10.34 = 3.88/x
  3. Step 3: Cross multiply
    6.89x = 10.34 × 3.88
  4. Step 4: Simplify right side
    6.89x = 40.10
  5. Step 5: Solve for x
    x = 40.10/6.89
  6. Step 6: Final answer
    x = 5.82

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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.