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Finding the Fourth Proportional to 519,890.70, 779,836.05 and 317,811.90

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Solution

The fourth proportional to 519,890.70, 779,836.05 and 317,811.90 is: 476,717.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,890.70 : 779,836.05 = 317,811.90 : x
  2. Step 2: Convert to fraction form
    519,890.70/779,836.05 = 317,811.90/x
  3. Step 3: Cross multiply
    519,890.70x = 779,836.05 × 317,811.90
  4. Step 4: Simplify right side
    519,890.70x = 247,841,176,739.00
  5. Step 5: Solve for x
    x = 247,841,176,739.00/519,890.70
  6. Step 6: Final answer
    x = 476,717.85

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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.