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Finding the Fourth Proportional to 388,081.20, 582,121.80 and 341,425.20

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Solution

The fourth proportional to 388,081.20, 582,121.80 and 341,425.20 is: 512,137.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,081.20 : 582,121.80 = 341,425.20 : x
  2. Step 2: Convert to fraction form
    388,081.20/582,121.80 = 341,425.20/x
  3. Step 3: Cross multiply
    388,081.20x = 582,121.80 × 341,425.20
  4. Step 4: Simplify right side
    388,081.20x = 198,751,051,989.36
  5. Step 5: Solve for x
    x = 198,751,051,989.36/388,081.20
  6. Step 6: Final answer
    x = 512,137.80

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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.