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Finding the Fourth Proportional to 639,333.20, 957,310.20 and 512,382.80

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Solution

The fourth proportional to 639,333.20, 957,310.20 and 512,382.80 is: 767,220.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,333.20 : 957,310.20 = 512,382.80 : x
  2. Step 2: Convert to fraction form
    639,333.20/957,310.20 = 512,382.80/x
  3. Step 3: Cross multiply
    639,333.20x = 957,310.20 × 512,382.80
  4. Step 4: Simplify right side
    639,333.20x = 490,509,280,744.56
  5. Step 5: Solve for x
    x = 490,509,280,744.56/639,333.20
  6. Step 6: Final answer
    x = 767,220.10

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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.