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Finding the Fourth Proportional to 1,984.55, 2,976.82 and 831.11

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Solution

The fourth proportional to 1,984.55, 2,976.82 and 831.11 is: 1,246.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,984.55 : 2,976.82 = 831.11 : x
  2. Step 2: Convert to fraction form
    1,984.55/2,976.82 = 831.11/x
  3. Step 3: Cross multiply
    1,984.55x = 2,976.82 × 831.11
  4. Step 4: Simplify right side
    1,984.55x = 2,474,047.91
  5. Step 5: Solve for x
    x = 2,474,047.91/1,984.55
  6. Step 6: Final answer
    x = 1,246.66

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