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Finding the Third Proportional to 663.94 and 1,311.38

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Solution

The third proportional to 663.94 and 1,311.38 is: 2,590.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.94 : 1,311.38 = 1,311.38 : x
  2. Step 2: Convert to fraction form
    663.94/1,311.38 = 1,311.38/x
  3. Step 3: Cross multiply
    663.94x = 1,311.38 × 1,311.38
  4. Step 4: Simplify right side
    663.94x = 1,719,704.39
  5. Step 5: Solve for x
    x = 1,719,704.39/663.94
  6. Step 6: Final answer
    x = 2,590.16

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Why These Related Problems?

These problems maintain the same ratio (1.98) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.