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Finding the Fourth Proportional to 668,014.62, 921,841.11 and 381,528.78

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Solution

The fourth proportional to 668,014.62, 921,841.11 and 381,528.78 is: 526,498.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,014.62 : 921,841.11 = 381,528.78 : x
  2. Step 2: Convert to fraction form
    668,014.62/921,841.11 = 381,528.78/x
  3. Step 3: Cross multiply
    668,014.62x = 921,841.11 × 381,528.78
  4. Step 4: Simplify right side
    668,014.62x = 351,708,914,052.15
  5. Step 5: Solve for x
    x = 351,708,914,052.15/668,014.62
  6. Step 6: Final answer
    x = 526,498.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.