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Finding the Fourth Proportional to 800.73, 1,200.63 and 389.35

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Solution

The fourth proportional to 800.73, 1,200.63 and 389.35 is: 583.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.73 : 1,200.63 = 389.35 : x
  2. Step 2: Convert to fraction form
    800.73/1,200.63 = 389.35/x
  3. Step 3: Cross multiply
    800.73x = 1,200.63 × 389.35
  4. Step 4: Simplify right side
    800.73x = 467,462.29
  5. Step 5: Solve for x
    x = 467,462.29/800.73
  6. Step 6: Final answer
    x = 583.80

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