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Finding the Fourth Proportional to 714,520.63, 986,034.49 and 392,236.21

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Solution

The fourth proportional to 714,520.63, 986,034.49 and 392,236.21 is: 541,283.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,520.63 : 986,034.49 = 392,236.21 : x
  2. Step 2: Convert to fraction form
    714,520.63/986,034.49 = 392,236.21/x
  3. Step 3: Cross multiply
    714,520.63x = 986,034.49 × 392,236.21
  4. Step 4: Simplify right side
    714,520.63x = 386,758,431,286.88
  5. Step 5: Solve for x
    x = 386,758,431,286.88/714,520.63
  6. Step 6: Final answer
    x = 541,283.79

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1.5x scale

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.