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Finding the Fourth Proportional to 439,018.56, 659,427.84 and 289,474.56

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Solution

The fourth proportional to 439,018.56, 659,427.84 and 289,474.56 is: 434,805.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,018.56 : 659,427.84 = 289,474.56 : x
  2. Step 2: Convert to fraction form
    439,018.56/659,427.84 = 289,474.56/x
  3. Step 3: Cross multiply
    439,018.56x = 659,427.84 × 289,474.56
  4. Step 4: Simplify right side
    439,018.56x = 190,887,583,835.75
  5. Step 5: Solve for x
    x = 190,887,583,835.75/439,018.56
  6. Step 6: Final answer
    x = 434,805.27

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1.5x scale

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.