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Finding the Third Proportional to 2.07 and 4.85

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Solution

The third proportional to 2.07 and 4.85 is: 11.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.07 : 4.85 = 4.85 : x
  2. Step 2: Convert to fraction form
    2.07/4.85 = 4.85/x
  3. Step 3: Cross multiply
    2.07x = 4.85 × 4.85
  4. Step 4: Simplify right side
    2.07x = 23.56
  5. Step 5: Solve for x
    x = 23.56/2.07
  6. Step 6: Final answer
    x = 11.40

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.