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Finding the Fourth Proportional to 393,339.76, 590,013.12 and 127,100.32

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Solution

The fourth proportional to 393,339.76, 590,013.12 and 127,100.32 is: 190,651.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,339.76 : 590,013.12 = 127,100.32 : x
  2. Step 2: Convert to fraction form
    393,339.76/590,013.12 = 127,100.32/x
  3. Step 3: Cross multiply
    393,339.76x = 590,013.12 × 127,100.32
  4. Step 4: Simplify right side
    393,339.76x = 74,990,856,356.20
  5. Step 5: Solve for x
    x = 74,990,856,356.20/393,339.76
  6. Step 6: Final answer
    x = 190,651.60

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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.