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Finding the Fourth Proportional to 543,815.40, 815,723.10 and 539,878.80

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Solution

The fourth proportional to 543,815.40, 815,723.10 and 539,878.80 is: 809,818.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,815.40 : 815,723.10 = 539,878.80 : x
  2. Step 2: Convert to fraction form
    543,815.40/815,723.10 = 539,878.80/x
  3. Step 3: Cross multiply
    543,815.40x = 815,723.10 × 539,878.80
  4. Step 4: Simplify right side
    543,815.40x = 440,391,608,360.28
  5. Step 5: Solve for x
    x = 440,391,608,360.28/543,815.40
  6. Step 6: Final answer
    x = 809,818.20

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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.