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Finding the Fourth Proportional to 8.00, 11.05 and 5.70

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Solution

The fourth proportional to 8.00, 11.05 and 5.70 is: 7.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.00 : 11.05 = 5.70 : x
  2. Step 2: Convert to fraction form
    8.00/11.05 = 5.70/x
  3. Step 3: Cross multiply
    8.00x = 11.05 × 5.70
  4. Step 4: Simplify right side
    8.00x = 63.00
  5. Step 5: Solve for x
    x = 63.00/8.00
  6. Step 6: Final answer
    x = 7.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.