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Finding the Fourth Proportional to 665,853.40, 998,909.70 and 192,554.20

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Solution

The fourth proportional to 665,853.40, 998,909.70 and 192,554.20 is: 288,868.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,853.40 : 998,909.70 = 192,554.20 : x
  2. Step 2: Convert to fraction form
    665,853.40/998,909.70 = 192,554.20/x
  3. Step 3: Cross multiply
    665,853.40x = 998,909.70 × 192,554.20
  4. Step 4: Simplify right side
    665,853.40x = 192,344,258,155.74
  5. Step 5: Solve for x
    x = 192,344,258,155.74/665,853.40
  6. Step 6: Final answer
    x = 288,868.78

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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.