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Finding the Third Proportional to 664.50 and 943.75

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Solution

The third proportional to 664.50 and 943.75 is: 1,340.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.50 : 943.75 = 943.75 : x
  2. Step 2: Convert to fraction form
    664.50/943.75 = 943.75/x
  3. Step 3: Cross multiply
    664.50x = 943.75 × 943.75
  4. Step 4: Simplify right side
    664.50x = 890,664.06
  5. Step 5: Solve for x
    x = 890,664.06/664.50
  6. Step 6: Final answer
    x = 1,340.35

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.