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Finding the Fourth Proportional to 519,100.20, 778,650.30 and 512,101.80

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Solution

The fourth proportional to 519,100.20, 778,650.30 and 512,101.80 is: 768,152.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,100.20 : 778,650.30 = 512,101.80 : x
  2. Step 2: Convert to fraction form
    519,100.20/778,650.30 = 512,101.80/x
  3. Step 3: Cross multiply
    519,100.20x = 778,650.30 × 512,101.80
  4. Step 4: Simplify right side
    519,100.20x = 398,748,220,200.54
  5. Step 5: Solve for x
    x = 398,748,220,200.54/519,100.20
  6. Step 6: Final answer
    x = 768,152.70

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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.