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Finding the Fourth Proportional to 521,520.40, 782,280.60 and 189,053.20

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Solution

The fourth proportional to 521,520.40, 782,280.60 and 189,053.20 is: 283,579.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,520.40 : 782,280.60 = 189,053.20 : x
  2. Step 2: Convert to fraction form
    521,520.40/782,280.60 = 189,053.20/x
  3. Step 3: Cross multiply
    521,520.40x = 782,280.60 × 189,053.20
  4. Step 4: Simplify right side
    521,520.40x = 147,892,650,727.92
  5. Step 5: Solve for x
    x = 147,892,650,727.92/521,520.40
  6. Step 6: Final answer
    x = 283,579.80

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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.