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Finding the Fourth Proportional to 521,939.70, 782,909.55 and 147,965.94

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Solution

The fourth proportional to 521,939.70, 782,909.55 and 147,965.94 is: 221,948.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,939.70 : 782,909.55 = 147,965.94 : x
  2. Step 2: Convert to fraction form
    521,939.70/782,909.55 = 147,965.94/x
  3. Step 3: Cross multiply
    521,939.70x = 782,909.55 × 147,965.94
  4. Step 4: Simplify right side
    521,939.70x = 115,843,947,500.73
  5. Step 5: Solve for x
    x = 115,843,947,500.73/521,939.70
  6. Step 6: Final answer
    x = 221,948.91

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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.