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Finding the Fourth Proportional to 395,919.72, 593,756.46 and 129,620.88

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Solution

The fourth proportional to 395,919.72, 593,756.46 and 129,620.88 is: 194,391.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,919.72 : 593,756.46 = 129,620.88 : x
  2. Step 2: Convert to fraction form
    395,919.72/593,756.46 = 129,620.88/x
  3. Step 3: Cross multiply
    395,919.72x = 593,756.46 × 129,620.88
  4. Step 4: Simplify right side
    395,919.72x = 76,963,234,850.88
  5. Step 5: Solve for x
    x = 76,963,234,850.88/395,919.72
  6. Step 6: Final answer
    x = 194,391.01

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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.