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Finding the Fourth Proportional to 519,866.80, 779,800.20 and 443,759.20

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Solution

The fourth proportional to 519,866.80, 779,800.20 and 443,759.20 is: 665,638.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,866.80 : 779,800.20 = 443,759.20 : x
  2. Step 2: Convert to fraction form
    519,866.80/779,800.20 = 443,759.20/x
  3. Step 3: Cross multiply
    519,866.80x = 779,800.20 × 443,759.20
  4. Step 4: Simplify right side
    519,866.80x = 346,043,512,911.84
  5. Step 5: Solve for x
    x = 346,043,512,911.84/519,866.80
  6. Step 6: Final answer
    x = 665,638.80

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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.