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Finding the Fourth Proportional to 714,348.87, 985,861.92 and 392,113.54

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Solution

The fourth proportional to 714,348.87, 985,861.92 and 392,113.54 is: 541,149.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,348.87 : 985,861.92 = 392,113.54 : x
  2. Step 2: Convert to fraction form
    714,348.87/985,861.92 = 392,113.54/x
  3. Step 3: Cross multiply
    714,348.87x = 985,861.92 × 392,113.54
  4. Step 4: Simplify right side
    714,348.87x = 386,569,807,402.40
  5. Step 5: Solve for x
    x = 386,569,807,402.40/714,348.87
  6. Step 6: Final answer
    x = 541,149.88

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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.