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Finding the Fourth Proportional to 7.30, 11.00 and 6.75

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Solution

The fourth proportional to 7.30, 11.00 and 6.75 is: 10.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7.30 : 11.00 = 6.75 : x
  2. Step 2: Convert to fraction form
    7.30/11.00 = 6.75/x
  3. Step 3: Cross multiply
    7.30x = 11.00 × 6.75
  4. Step 4: Simplify right side
    7.30x = 74.27
  5. Step 5: Solve for x
    x = 74.27/7.30
  6. Step 6: Final answer
    x = 10.17

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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.