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Finding the Third Proportional to 4.90 and 12.55

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Solution

The third proportional to 4.90 and 12.55 is: 32.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    4.90 : 12.55 = 12.55 : x
  2. Step 2: Convert to fraction form
    4.90/12.55 = 12.55/x
  3. Step 3: Cross multiply
    4.90x = 12.55 × 12.55
  4. Step 4: Simplify right side
    4.90x = 157.56
  5. Step 5: Solve for x
    x = 157.56/4.90
  6. Step 6: Final answer
    x = 32.18

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Why These Related Problems?

These problems maintain the same ratio (2.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.