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Finding the Fourth Proportional to 561,728.70, 840,843.45 and 404,264.70

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Solution

The fourth proportional to 561,728.70, 840,843.45 and 404,264.70 is: 605,137.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,728.70 : 840,843.45 = 404,264.70 : x
  2. Step 2: Convert to fraction form
    561,728.70/840,843.45 = 404,264.70/x
  3. Step 3: Cross multiply
    561,728.70x = 840,843.45 × 404,264.70
  4. Step 4: Simplify right side
    561,728.70x = 339,923,325,061.22
  5. Step 5: Solve for x
    x = 339,923,325,061.22/561,728.70
  6. Step 6: Final answer
    x = 605,137.90

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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.