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Finding the Fourth Proportional to 579,942.80, 869,914.20 and 519,117.20

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Solution

The fourth proportional to 579,942.80, 869,914.20 and 519,117.20 is: 778,675.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,942.80 : 869,914.20 = 519,117.20 : x
  2. Step 2: Convert to fraction form
    579,942.80/869,914.20 = 519,117.20/x
  3. Step 3: Cross multiply
    579,942.80x = 869,914.20 × 519,117.20
  4. Step 4: Simplify right side
    579,942.80x = 451,587,423,744.24
  5. Step 5: Solve for x
    x = 451,587,423,744.24/579,942.80
  6. Step 6: Final answer
    x = 778,675.80

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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.