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Finding the Fourth Proportional to 7.25, 10.87 and 2.97

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Solution

The fourth proportional to 7.25, 10.87 and 2.97 is: 4.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.25 : 10.87 = 2.97 : x
  2. Step 2: Convert to fraction form
    7.25/10.87 = 2.97/x
  3. Step 3: Cross multiply
    7.25x = 10.87 × 2.97
  4. Step 4: Simplify right side
    7.25x = 32.28
  5. Step 5: Solve for x
    x = 32.28/7.25
  6. Step 6: Final answer
    x = 4.45

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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.