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Finding the Fourth Proportional to 385,825.60, 577,960.80 and 219,419.20

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Solution

The fourth proportional to 385,825.60, 577,960.80 and 219,419.20 is: 328,686.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,825.60 : 577,960.80 = 219,419.20 : x
  2. Step 2: Convert to fraction form
    385,825.60/577,960.80 = 219,419.20/x
  3. Step 3: Cross multiply
    385,825.60x = 577,960.80 × 219,419.20
  4. Step 4: Simplify right side
    385,825.60x = 126,815,696,367.36
  5. Step 5: Solve for x
    x = 126,815,696,367.36/385,825.60
  6. Step 6: Final answer
    x = 328,686.58

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