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Finding the Fourth Proportional to 398,430.22, 549,817.65 and 217,138.30

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Solution

The fourth proportional to 398,430.22, 549,817.65 and 217,138.30 is: 299,642.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,430.22 : 549,817.65 = 217,138.30 : x
  2. Step 2: Convert to fraction form
    398,430.22/549,817.65 = 217,138.30/x
  3. Step 3: Cross multiply
    398,430.22x = 549,817.65 × 217,138.30
  4. Step 4: Simplify right side
    398,430.22x = 119,386,469,831.00
  5. Step 5: Solve for x
    x = 119,386,469,831.00/398,430.22
  6. Step 6: Final answer
    x = 299,642.11

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