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Finding the Fourth Proportional to 619,008.40, 928,512.60 and 512,720.20

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Solution

The fourth proportional to 619,008.40, 928,512.60 and 512,720.20 is: 769,080.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,008.40 : 928,512.60 = 512,720.20 : x
  2. Step 2: Convert to fraction form
    619,008.40/928,512.60 = 512,720.20/x
  3. Step 3: Cross multiply
    619,008.40x = 928,512.60 × 512,720.20
  4. Step 4: Simplify right side
    619,008.40x = 476,067,165,974.52
  5. Step 5: Solve for x
    x = 476,067,165,974.52/619,008.40
  6. Step 6: Final answer
    x = 769,080.30

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Similar ratio
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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.