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Finding the Fourth Proportional to 698,113.80, 963,395.28 and 392,198.76

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Solution

The fourth proportional to 698,113.80, 963,395.28 and 392,198.76 is: 541,233.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,113.80 : 963,395.28 = 392,198.76 : x
  2. Step 2: Convert to fraction form
    698,113.80/963,395.28 = 392,198.76/x
  3. Step 3: Cross multiply
    698,113.80x = 963,395.28 × 392,198.76
  4. Step 4: Simplify right side
    698,113.80x = 377,842,434,205.85
  5. Step 5: Solve for x
    x = 377,842,434,205.85/698,113.80
  6. Step 6: Final answer
    x = 541,233.30

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Double scale
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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.