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Finding the Fourth Proportional to 7.36, 11.12 and 7.22

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Solution

The fourth proportional to 7.36, 11.12 and 7.22 is: 10.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.36 : 11.12 = 7.22 : x
  2. Step 2: Convert to fraction form
    7.36/11.12 = 7.22/x
  3. Step 3: Cross multiply
    7.36x = 11.12 × 7.22
  4. Step 4: Simplify right side
    7.36x = 80.28
  5. Step 5: Solve for x
    x = 80.28/7.36
  6. Step 6: Final answer
    x = 10.91

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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.