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Finding the Fourth Proportional to 521,894.30, 781,512.50 and 343,861.56

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Solution

The fourth proportional to 521,894.30, 781,512.50 and 343,861.56 is: 514,916.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,894.30 : 781,512.50 = 343,861.56 : x
  2. Step 2: Convert to fraction form
    521,894.30/781,512.50 = 343,861.56/x
  3. Step 3: Cross multiply
    521,894.30x = 781,512.50 × 343,861.56
  4. Step 4: Simplify right side
    521,894.30x = 268,732,107,409.50
  5. Step 5: Solve for x
    x = 268,732,107,409.50/521,894.30
  6. Step 6: Final answer
    x = 514,916.73

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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.