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Finding the Fourth Proportional to 647,639.19, 971,540.17 and 347,707.51

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Solution

The fourth proportional to 647,639.19, 971,540.17 and 347,707.51 is: 521,604.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,639.19 : 971,540.17 = 347,707.51 : x
  2. Step 2: Convert to fraction form
    647,639.19/971,540.17 = 347,707.51/x
  3. Step 3: Cross multiply
    647,639.19x = 971,540.17 × 347,707.51
  4. Step 4: Simplify right side
    647,639.19x = 337,811,813,375.68
  5. Step 5: Solve for x
    x = 337,811,813,375.68/647,639.19
  6. Step 6: Final answer
    x = 521,604.96

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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.