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Finding the Fourth Proportional to 485,200.80, 728,060.40 and 219,002.40

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Solution

The fourth proportional to 485,200.80, 728,060.40 and 219,002.40 is: 328,620.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,200.80 : 728,060.40 = 219,002.40 : x
  2. Step 2: Convert to fraction form
    485,200.80/728,060.40 = 219,002.40/x
  3. Step 3: Cross multiply
    485,200.80x = 728,060.40 × 219,002.40
  4. Step 4: Simplify right side
    485,200.80x = 159,446,974,944.96
  5. Step 5: Solve for x
    x = 159,446,974,944.96/485,200.80
  6. Step 6: Final answer
    x = 328,620.59

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