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Finding the Fourth Proportional to 409,321.96, 560,773.67 and 393,981.44

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Solution

The fourth proportional to 409,321.96, 560,773.67 and 393,981.44 is: 539,757.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,321.96 : 560,773.67 = 393,981.44 : x
  2. Step 2: Convert to fraction form
    409,321.96/560,773.67 = 393,981.44/x
  3. Step 3: Cross multiply
    409,321.96x = 560,773.67 × 393,981.44
  4. Step 4: Simplify right side
    409,321.96x = 220,934,413,246.91
  5. Step 5: Solve for x
    x = 220,934,413,246.91/409,321.96
  6. Step 6: Final answer
    x = 539,757.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.