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Finding the Third Proportional to 5.12 and 5.78

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Solution

The third proportional to 5.12 and 5.78 is: 6.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5.12 : 5.78 = 5.78 : x
  2. Step 2: Convert to fraction form
    5.12/5.78 = 5.78/x
  3. Step 3: Cross multiply
    5.12x = 5.78 × 5.78
  4. Step 4: Simplify right side
    5.12x = 33.42
  5. Step 5: Solve for x
    x = 33.42/5.12
  6. Step 6: Final answer
    x = 6.53

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.