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Finding the Fourth Proportional to 519,679.70, 778,863.45 and 252,865.70

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Solution

The fourth proportional to 519,679.70, 778,863.45 and 252,865.70 is: 378,979.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,679.70 : 778,863.45 = 252,865.70 : x
  2. Step 2: Convert to fraction form
    519,679.70/778,863.45 = 252,865.70/x
  3. Step 3: Cross multiply
    519,679.70x = 778,863.45 × 252,865.70
  4. Step 4: Simplify right side
    519,679.70x = 196,947,851,488.67
  5. Step 5: Solve for x
    x = 196,947,851,488.67/519,679.70
  6. Step 6: Final answer
    x = 378,979.30

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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.