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Finding the Fourth Proportional to 698,711.01, 964,168.09 and 392,738.78

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Solution

The fourth proportional to 698,711.01, 964,168.09 and 392,738.78 is: 541,949.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,711.01 : 964,168.09 = 392,738.78 : x
  2. Step 2: Convert to fraction form
    698,711.01/964,168.09 = 392,738.78/x
  3. Step 3: Cross multiply
    698,711.01x = 964,168.09 × 392,738.78
  4. Step 4: Simplify right side
    698,711.01x = 378,666,193,578.84
  5. Step 5: Solve for x
    x = 378,666,193,578.84/698,711.01
  6. Step 6: Final answer
    x = 541,949.66

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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.