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Finding the Fourth Proportional to 7.25, 10.88 and 6.87

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Solution

The fourth proportional to 7.25, 10.88 and 6.87 is: 10.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.25 : 10.88 = 6.87 : x
  2. Step 2: Convert to fraction form
    7.25/10.88 = 6.87/x
  3. Step 3: Cross multiply
    7.25x = 10.88 × 6.87
  4. Step 4: Simplify right side
    7.25x = 74.71
  5. Step 5: Solve for x
    x = 74.71/7.25
  6. Step 6: Final answer
    x = 10.31

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.