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Finding the Fourth Proportional to 512,973.20, 768,538.20 and 439,245.20

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Solution

The fourth proportional to 512,973.20, 768,538.20 and 439,245.20 is: 658,078.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,973.20 : 768,538.20 = 439,245.20 : x
  2. Step 2: Convert to fraction form
    512,973.20/768,538.20 = 439,245.20/x
  3. Step 3: Cross multiply
    512,973.20x = 768,538.20 × 439,245.20
  4. Step 4: Simplify right side
    512,973.20x = 337,576,715,366.64
  5. Step 5: Solve for x
    x = 337,576,715,366.64/512,973.20
  6. Step 6: Final answer
    x = 658,078.66

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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.