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Finding the Fourth Proportional to 519,939.60, 779,909.40 and 449,080.80

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Solution

The fourth proportional to 519,939.60, 779,909.40 and 449,080.80 is: 673,621.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,939.60 : 779,909.40 = 449,080.80 : x
  2. Step 2: Convert to fraction form
    519,939.60/779,909.40 = 449,080.80/x
  3. Step 3: Cross multiply
    519,939.60x = 779,909.40 × 449,080.80
  4. Step 4: Simplify right side
    519,939.60x = 350,242,337,279.52
  5. Step 5: Solve for x
    x = 350,242,337,279.52/519,939.60
  6. Step 6: Final answer
    x = 673,621.20

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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.