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Finding the Fourth Proportional to 518,301.35, 715,313.92 and 288,879.58

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Solution

The fourth proportional to 518,301.35, 715,313.92 and 288,879.58 is: 398,686.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,301.35 : 715,313.92 = 288,879.58 : x
  2. Step 2: Convert to fraction form
    518,301.35/715,313.92 = 288,879.58/x
  3. Step 3: Cross multiply
    518,301.35x = 715,313.92 × 288,879.58
  4. Step 4: Simplify right side
    518,301.35x = 206,639,581,201.18
  5. Step 5: Solve for x
    x = 206,639,581,201.18/518,301.35
  6. Step 6: Final answer
    x = 398,686.18

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