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Finding the Fourth Proportional to 1,364.76, 2,047.18 and 390.94

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Solution

The fourth proportional to 1,364.76, 2,047.18 and 390.94 is: 586.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,364.76 : 2,047.18 = 390.94 : x
  2. Step 2: Convert to fraction form
    1,364.76/2,047.18 = 390.94/x
  3. Step 3: Cross multiply
    1,364.76x = 2,047.18 × 390.94
  4. Step 4: Simplify right side
    1,364.76x = 800,324.55
  5. Step 5: Solve for x
    x = 800,324.55/1,364.76
  6. Step 6: Final answer
    x = 586.42

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