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Finding the Third Proportional to 3.05 and 4.00

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Solution

The third proportional to 3.05 and 4.00 is: 5.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3.05 : 4.00 = 4.00 : x
  2. Step 2: Convert to fraction form
    3.05/4.00 = 4.00/x
  3. Step 3: Cross multiply
    3.05x = 4.00 × 4.00
  4. Step 4: Simplify right side
    3.05x = 15.98
  5. Step 5: Solve for x
    x = 15.98/3.05
  6. Step 6: Final answer
    x = 5.25

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.