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Finding the Fourth Proportional to 519,209.60, 778,814.40 and 487,716.80

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Solution

The fourth proportional to 519,209.60, 778,814.40 and 487,716.80 is: 731,575.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,209.60 : 778,814.40 = 487,716.80 : x
  2. Step 2: Convert to fraction form
    519,209.60/778,814.40 = 487,716.80/x
  3. Step 3: Cross multiply
    519,209.60x = 778,814.40 × 487,716.80
  4. Step 4: Simplify right side
    519,209.60x = 379,840,866,961.92
  5. Step 5: Solve for x
    x = 379,840,866,961.92/519,209.60
  6. Step 6: Final answer
    x = 731,575.20

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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.