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Finding the Third Proportional to 328,978 and 717,451

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Solution

The third proportional to 328,978 and 717,451 is: 1,564,651.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,978 : 717,451 = 717,451 : x
  2. Step 2: Convert to fraction form
    328,978/717,451 = 717,451/x
  3. Step 3: Cross multiply
    328,978x = 717,451 × 717,451
  4. Step 4: Simplify right side
    328,978x = 514,735,937,401
  5. Step 5: Solve for x
    x = 514,735,937,401/328,978
  6. Step 6: Final answer
    x = 1,564,651.55

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