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Finding the Fourth Proportional to 519,683.30, 779,816.55 and 220,112.90

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Solution

The fourth proportional to 519,683.30, 779,816.55 and 220,112.90 is: 330,292.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,683.30 : 779,816.55 = 220,112.90 : x
  2. Step 2: Convert to fraction form
    519,683.30/779,816.55 = 220,112.90/x
  3. Step 3: Cross multiply
    519,683.30x = 779,816.55 × 220,112.90
  4. Step 4: Simplify right side
    519,683.30x = 171,647,682,288.50
  5. Step 5: Solve for x
    x = 171,647,682,288.50/519,683.30
  6. Step 6: Final answer
    x = 330,292.86

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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.