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Finding the Fourth Proportional to 519,238.60, 778,857.90 and 487,745.80

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Solution

The fourth proportional to 519,238.60, 778,857.90 and 487,745.80 is: 731,618.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,238.60 : 778,857.90 = 487,745.80 : x
  2. Step 2: Convert to fraction form
    519,238.60/778,857.90 = 487,745.80/x
  3. Step 3: Cross multiply
    519,238.60x = 778,857.90 × 487,745.80
  4. Step 4: Simplify right side
    519,238.60x = 379,884,669,521.82
  5. Step 5: Solve for x
    x = 379,884,669,521.82/519,238.60
  6. Step 6: Final answer
    x = 731,618.70

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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.