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Finding the Fourth Proportional to 639,231.20, 958,846.80 and 525,069.80

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Solution

The fourth proportional to 639,231.20, 958,846.80 and 525,069.80 is: 787,604.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,231.20 : 958,846.80 = 525,069.80 : x
  2. Step 2: Convert to fraction form
    639,231.20/958,846.80 = 525,069.80/x
  3. Step 3: Cross multiply
    639,231.20x = 958,846.80 × 525,069.80
  4. Step 4: Simplify right side
    639,231.20x = 503,461,497,506.64
  5. Step 5: Solve for x
    x = 503,461,497,506.64/639,231.20
  6. Step 6: Final answer
    x = 787,604.70

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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.