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Finding the Third Proportional to 645.38 and 965.63

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Solution

The third proportional to 645.38 and 965.63 is: 1,444.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    645.38 : 965.63 = 965.63 : x
  2. Step 2: Convert to fraction form
    645.38/965.63 = 965.63/x
  3. Step 3: Cross multiply
    645.38x = 965.63 × 965.63
  4. Step 4: Simplify right side
    645.38x = 932,431.64
  5. Step 5: Solve for x
    x = 932,431.64/645.38
  6. Step 6: Final answer
    x = 1,444.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.