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Finding the Fourth Proportional to 439,165.44, 605,713.86 and 378,015.66

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Solution

The fourth proportional to 439,165.44, 605,713.86 and 378,015.66 is: 521,373.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,165.44 : 605,713.86 = 378,015.66 : x
  2. Step 2: Convert to fraction form
    439,165.44/605,713.86 = 378,015.66/x
  3. Step 3: Cross multiply
    439,165.44x = 605,713.86 × 378,015.66
  4. Step 4: Simplify right side
    439,165.44x = 228,969,324,559.05
  5. Step 5: Solve for x
    x = 228,969,324,559.05/439,165.44
  6. Step 6: Final answer
    x = 521,373.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.