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Finding the Third Proportional to 978 and 1,326

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Solution

The third proportional to 978 and 1,326 is: 1,797.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    978 : 1,326 = 1,326 : x
  2. Step 2: Convert to fraction form
    978/1,326 = 1,326/x
  3. Step 3: Cross multiply
    978x = 1,326 × 1,326
  4. Step 4: Simplify right side
    978x = 1,758,276
  5. Step 5: Solve for x
    x = 1,758,276/978
  6. Step 6: Final answer
    x = 1,797.83

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These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.