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Finding the Third Proportional to 51.56 and 135.28

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Solution

The third proportional to 51.56 and 135.28 is: 354.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.56 : 135.28 = 135.28 : x
  2. Step 2: Convert to fraction form
    51.56/135.28 = 135.28/x
  3. Step 3: Cross multiply
    51.56x = 135.28 × 135.28
  4. Step 4: Simplify right side
    51.56x = 18,301.02
  5. Step 5: Solve for x
    x = 18,301.02/51.56
  6. Step 6: Final answer
    x = 354.93

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Why These Related Problems?

These problems maintain the same ratio (2.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.