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Finding the Fourth Proportional to 485,726.30, 728,650.56 and 260,777.60

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Solution

The fourth proportional to 485,726.30, 728,650.56 and 260,777.60 is: 391,199.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,726.30 : 728,650.56 = 260,777.60 : x
  2. Step 2: Convert to fraction form
    485,726.30/728,650.56 = 260,777.60/x
  3. Step 3: Cross multiply
    485,726.30x = 728,650.56 × 260,777.60
  4. Step 4: Simplify right side
    485,726.30x = 190,015,744,275.46
  5. Step 5: Solve for x
    x = 190,015,744,275.46/485,726.30
  6. Step 6: Final answer
    x = 391,199.21

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