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Finding the Fourth Proportional to 7.62, 10.47 and 6.71

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Solution

The fourth proportional to 7.62, 10.47 and 6.71 is: 9.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.62 : 10.47 = 6.71 : x
  2. Step 2: Convert to fraction form
    7.62/10.47 = 6.71/x
  3. Step 3: Cross multiply
    7.62x = 10.47 × 6.71
  4. Step 4: Simplify right side
    7.62x = 70.25
  5. Step 5: Solve for x
    x = 70.25/7.62
  6. Step 6: Final answer
    x = 9.22

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.