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Finding the Fourth Proportional to 512,785.10, 769,870.20 and 299,771.30

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Solution

The fourth proportional to 512,785.10, 769,870.20 and 299,771.30 is: 450,061.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,785.10 : 769,870.20 = 299,771.30 : x
  2. Step 2: Convert to fraction form
    512,785.10/769,870.20 = 299,771.30/x
  3. Step 3: Cross multiply
    512,785.10x = 769,870.20 × 299,771.30
  4. Step 4: Simplify right side
    512,785.10x = 230,784,990,685.26
  5. Step 5: Solve for x
    x = 230,784,990,685.26/512,785.10
  6. Step 6: Final answer
    x = 450,061.81

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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.