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Finding the Fourth Proportional to 519,256.20, 778,301.10 and 219,685.80

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Solution

The fourth proportional to 519,256.20, 778,301.10 and 219,685.80 is: 329,281.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,256.20 : 778,301.10 = 219,685.80 : x
  2. Step 2: Convert to fraction form
    519,256.20/778,301.10 = 219,685.80/x
  3. Step 3: Cross multiply
    519,256.20x = 778,301.10 × 219,685.80
  4. Step 4: Simplify right side
    519,256.20x = 170,981,699,794.38
  5. Step 5: Solve for x
    x = 170,981,699,794.38/519,256.20
  6. Step 6: Final answer
    x = 329,281.96

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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.