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Finding the Third Proportional to 664.75 and 1,011.38

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Solution

The third proportional to 664.75 and 1,011.38 is: 1,538.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.75 : 1,011.38 = 1,011.38 : x
  2. Step 2: Convert to fraction form
    664.75/1,011.38 = 1,011.38/x
  3. Step 3: Cross multiply
    664.75x = 1,011.38 × 1,011.38
  4. Step 4: Simplify right side
    664.75x = 1,022,879.39
  5. Step 5: Solve for x
    x = 1,022,879.39/664.75
  6. Step 6: Final answer
    x = 1,538.74

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.