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Finding the Fourth Proportional to 639,863.10, 959,794.65 and 630,531.90

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Solution

The fourth proportional to 639,863.10, 959,794.65 and 630,531.90 is: 945,797.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,863.10 : 959,794.65 = 630,531.90 : x
  2. Step 2: Convert to fraction form
    639,863.10/959,794.65 = 630,531.90/x
  3. Step 3: Cross multiply
    639,863.10x = 959,794.65 × 630,531.90
  4. Step 4: Simplify right side
    639,863.10x = 605,181,144,274.34
  5. Step 5: Solve for x
    x = 605,181,144,274.34/639,863.10
  6. Step 6: Final answer
    x = 945,797.85

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Double scale
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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.