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Finding the Fourth Proportional to 439,680.78, 659,519.46 and 186,921.90

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Solution

The fourth proportional to 439,680.78, 659,519.46 and 186,921.90 is: 280,382.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,680.78 : 659,519.46 = 186,921.90 : x
  2. Step 2: Convert to fraction form
    439,680.78/659,519.46 = 186,921.90/x
  3. Step 3: Cross multiply
    439,680.78x = 659,519.46 × 186,921.90
  4. Step 4: Simplify right side
    439,680.78x = 123,278,630,550.17
  5. Step 5: Solve for x
    x = 123,278,630,550.17/439,680.78
  6. Step 6: Final answer
    x = 280,382.12

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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.