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Finding the Fourth Proportional to 331,318.90, 496,978.35 and 278,830.90

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Solution

The fourth proportional to 331,318.90, 496,978.35 and 278,830.90 is: 418,246.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,318.90 : 496,978.35 = 278,830.90 : x
  2. Step 2: Convert to fraction form
    331,318.90/496,978.35 = 278,830.90/x
  3. Step 3: Cross multiply
    331,318.90x = 496,978.35 × 278,830.90
  4. Step 4: Simplify right side
    331,318.90x = 138,572,920,611.02
  5. Step 5: Solve for x
    x = 138,572,920,611.02/331,318.90
  6. Step 6: Final answer
    x = 418,246.35

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