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Finding the Fourth Proportional to 820,800.14, 1,231,323.12 and 288,227.30

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Solution

The fourth proportional to 820,800.14, 1,231,323.12 and 288,227.30 is: 432,384.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,800.14 : 1,231,323.12 = 288,227.30 : x
  2. Step 2: Convert to fraction form
    820,800.14/1,231,323.12 = 288,227.30/x
  3. Step 3: Cross multiply
    820,800.14x = 1,231,323.12 × 288,227.30
  4. Step 4: Simplify right side
    820,800.14x = 354,900,932,148.56
  5. Step 5: Solve for x
    x = 354,900,932,148.56/820,800.14
  6. Step 6: Final answer
    x = 432,384.11

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