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Finding the Third Proportional to 0.79 and 0.85

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Solution

The third proportional to 0.79 and 0.85 is: 0.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    0.79 : 0.85 = 0.85 : x
  2. Step 2: Convert to fraction form
    0.79/0.85 = 0.85/x
  3. Step 3: Cross multiply
    0.79x = 0.85 × 0.85
  4. Step 4: Simplify right side
    0.79x = 0.73
  5. Step 5: Solve for x
    x = 0.73/0.79
  6. Step 6: Final answer
    x = 0.92

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.