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Finding the Fourth Proportional to 6.47, 8.92 and 6.11

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Solution

The fourth proportional to 6.47, 8.92 and 6.11 is: 8.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.47 : 8.92 = 6.11 : x
  2. Step 2: Convert to fraction form
    6.47/8.92 = 6.11/x
  3. Step 3: Cross multiply
    6.47x = 8.92 × 6.11
  4. Step 4: Simplify right side
    6.47x = 54.50
  5. Step 5: Solve for x
    x = 54.50/6.47
  6. Step 6: Final answer
    x = 8.42

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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.