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Finding the Fourth Proportional to 521,891.99, 781,508.77 and 343,859.39

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Solution

The fourth proportional to 521,891.99, 781,508.77 and 343,859.39 is: 514,913.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,891.99 : 781,508.77 = 343,859.39 : x
  2. Step 2: Convert to fraction form
    521,891.99/781,508.77 = 343,859.39/x
  3. Step 3: Cross multiply
    521,891.99x = 781,508.77 × 343,859.39
  4. Step 4: Simplify right side
    521,891.99x = 268,729,124,164.66
  5. Step 5: Solve for x
    x = 268,729,124,164.66/521,891.99
  6. Step 6: Final answer
    x = 514,913.30

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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.