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Finding the Fourth Proportional to 505,215.75, 697,197.80 and 278,861.31

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Solution

The fourth proportional to 505,215.75, 697,197.80 and 278,861.31 is: 384,828.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,215.75 : 697,197.80 = 278,861.31 : x
  2. Step 2: Convert to fraction form
    505,215.75/697,197.80 = 278,861.31/x
  3. Step 3: Cross multiply
    505,215.75x = 697,197.80 × 278,861.31
  4. Step 4: Simplify right side
    505,215.75x = 194,421,491,837.12
  5. Step 5: Solve for x
    x = 194,421,491,837.12/505,215.75
  6. Step 6: Final answer
    x = 384,828.64

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