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Finding the Fourth Proportional to 381,438.88, 526,390.40 and 211,688.80

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Solution

The fourth proportional to 381,438.88, 526,390.40 and 211,688.80 is: 292,133.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,438.88 : 526,390.40 = 211,688.80 : x
  2. Step 2: Convert to fraction form
    381,438.88/526,390.40 = 211,688.80/x
  3. Step 3: Cross multiply
    381,438.88x = 526,390.40 × 211,688.80
  4. Step 4: Simplify right side
    381,438.88x = 111,430,952,107.52
  5. Step 5: Solve for x
    x = 111,430,952,107.52/381,438.88
  6. Step 6: Final answer
    x = 292,133.18

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