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Finding the Third Proportional to 57.75 and 65

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Solution

The third proportional to 57.75 and 65 is: 73.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.75 : 65 = 65 : x
  2. Step 2: Convert to fraction form
    57.75/65 = 65/x
  3. Step 3: Cross multiply
    57.75x = 65 × 65
  4. Step 4: Simplify right side
    57.75x = 4,225
  5. Step 5: Solve for x
    x = 4,225/57.75
  6. Step 6: Final answer
    x = 73.16

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.