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Finding the Third Proportional to 25.78 and 47.34

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Solution

The third proportional to 25.78 and 47.34 is: 86.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.78 : 47.34 = 47.34 : x
  2. Step 2: Convert to fraction form
    25.78/47.34 = 47.34/x
  3. Step 3: Cross multiply
    25.78x = 47.34 × 47.34
  4. Step 4: Simplify right side
    25.78x = 2,241.43
  5. Step 5: Solve for x
    x = 2,241.43/25.78
  6. Step 6: Final answer
    x = 86.94

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Why These Related Problems?

These problems maintain the same ratio (1.84) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.