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Finding the Fourth Proportional to 388,955.20, 582,511.20 and 263,617.60

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Solution

The fourth proportional to 388,955.20, 582,511.20 and 263,617.60 is: 394,801.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,955.20 : 582,511.20 = 263,617.60 : x
  2. Step 2: Convert to fraction form
    388,955.20/582,511.20 = 263,617.60/x
  3. Step 3: Cross multiply
    388,955.20x = 582,511.20 × 263,617.60
  4. Step 4: Simplify right side
    388,955.20x = 153,560,204,517.12
  5. Step 5: Solve for x
    x = 153,560,204,517.12/388,955.20
  6. Step 6: Final answer
    x = 394,801.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.