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Finding the Third Proportional to 57.25 and 69.63

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Solution

The third proportional to 57.25 and 69.63 is: 84.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.25 : 69.63 = 69.63 : x
  2. Step 2: Convert to fraction form
    57.25/69.63 = 69.63/x
  3. Step 3: Cross multiply
    57.25x = 69.63 × 69.63
  4. Step 4: Simplify right side
    57.25x = 4,847.64
  5. Step 5: Solve for x
    x = 4,847.64/57.25
  6. Step 6: Final answer
    x = 84.67

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Why These Related Problems?

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