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Finding the Fourth Proportional to 6.72, 10.12 and 6.49

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Solution

The fourth proportional to 6.72, 10.12 and 6.49 is: 9.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.72 : 10.12 = 6.49 : x
  2. Step 2: Convert to fraction form
    6.72/10.12 = 6.49/x
  3. Step 3: Cross multiply
    6.72x = 10.12 × 6.49
  4. Step 4: Simplify right side
    6.72x = 65.63
  5. Step 5: Solve for x
    x = 65.63/6.72
  6. Step 6: Final answer
    x = 9.77

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.