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Finding the Fourth Proportional to 485,978.46, 728,376.68 and 343,864.68

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Solution

The fourth proportional to 485,978.46, 728,376.68 and 343,864.68 is: 515,378.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,978.46 : 728,376.68 = 343,864.68 : x
  2. Step 2: Convert to fraction form
    485,978.46/728,376.68 = 343,864.68/x
  3. Step 3: Cross multiply
    485,978.46x = 728,376.68 × 343,864.68
  4. Step 4: Simplify right side
    485,978.46x = 250,463,013,987.66
  5. Step 5: Solve for x
    x = 250,463,013,987.66/485,978.46
  6. Step 6: Final answer
    x = 515,378.84

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