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Finding the Fourth Proportional to 398,406.81, 549,801.41 and 219,558.81

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Solution

The fourth proportional to 398,406.81, 549,801.41 and 219,558.81 is: 302,991.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,406.81 : 549,801.41 = 219,558.81 : x
  2. Step 2: Convert to fraction form
    398,406.81/549,801.41 = 219,558.81/x
  3. Step 3: Cross multiply
    398,406.81x = 549,801.41 × 219,558.81
  4. Step 4: Simplify right side
    398,406.81x = 120,713,743,315.92
  5. Step 5: Solve for x
    x = 120,713,743,315.92/398,406.81
  6. Step 6: Final answer
    x = 302,991.16

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