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Finding the Fourth Proportional to 485,434.55, 728,401.32 and 372,309.09

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Solution

The fourth proportional to 485,434.55, 728,401.32 and 372,309.09 is: 558,654.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,434.55 : 728,401.32 = 372,309.09 : x
  2. Step 2: Convert to fraction form
    485,434.55/728,401.32 = 372,309.09/x
  3. Step 3: Cross multiply
    485,434.55x = 728,401.32 × 372,309.09
  4. Step 4: Simplify right side
    485,434.55x = 271,190,432,604.00
  5. Step 5: Solve for x
    x = 271,190,432,604.00/485,434.55
  6. Step 6: Final answer
    x = 558,654.99

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