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Finding the Fourth Proportional to 318,951.76, 440,629.32 and 257,606.40

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Solution

The fourth proportional to 318,951.76, 440,629.32 and 257,606.40 is: 355,881.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,951.76 : 440,629.32 = 257,606.40 : x
  2. Step 2: Convert to fraction form
    318,951.76/440,629.32 = 257,606.40/x
  3. Step 3: Cross multiply
    318,951.76x = 440,629.32 × 257,606.40
  4. Step 4: Simplify right side
    318,951.76x = 113,508,932,859.65
  5. Step 5: Solve for x
    x = 113,508,932,859.65/318,951.76
  6. Step 6: Final answer
    x = 355,881.19

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