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Finding the Fourth Proportional to 279,378.90, 419,180.58 and 127,647.90

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Solution

The fourth proportional to 279,378.90, 419,180.58 and 127,647.90 is: 191,523.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,378.90 : 419,180.58 = 127,647.90 : x
  2. Step 2: Convert to fraction form
    279,378.90/419,180.58 = 127,647.90/x
  3. Step 3: Cross multiply
    279,378.90x = 419,180.58 × 127,647.90
  4. Step 4: Simplify right side
    279,378.90x = 53,507,520,757.78
  5. Step 5: Solve for x
    x = 53,507,520,757.78/279,378.90
  6. Step 6: Final answer
    x = 191,523.13

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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.