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Finding the Third Proportional to 42 and 51.25

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Solution

The third proportional to 42 and 51.25 is: 62.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    42 : 51.25 = 51.25 : x
  2. Step 2: Convert to fraction form
    42/51.25 = 51.25/x
  3. Step 3: Cross multiply
    42x = 51.25 × 51.25
  4. Step 4: Simplify right side
    42x = 2,626.56
  5. Step 5: Solve for x
    x = 2,626.56/42
  6. Step 6: Final answer
    x = 62.54

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These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.