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Finding the Fourth Proportional to 7.52, 11.21 and 7.23

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Solution

The fourth proportional to 7.52, 11.21 and 7.23 is: 10.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.52 : 11.21 = 7.23 : x
  2. Step 2: Convert to fraction form
    7.52/11.21 = 7.23/x
  3. Step 3: Cross multiply
    7.52x = 11.21 × 7.23
  4. Step 4: Simplify right side
    7.52x = 81.05
  5. Step 5: Solve for x
    x = 81.05/7.52
  6. Step 6: Final answer
    x = 10.78

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.