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Finding the Fourth Proportional to 393,668, 543,258.88 and 223,901.92

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Solution

The fourth proportional to 393,668, 543,258.88 and 223,901.92 is: 308,982.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,668 : 543,258.88 = 223,901.92 : x
  2. Step 2: Convert to fraction form
    393,668/543,258.88 = 223,901.92/x
  3. Step 3: Cross multiply
    393,668x = 543,258.88 × 223,901.92
  4. Step 4: Simplify right side
    393,668x = 121,636,706,289.05
  5. Step 5: Solve for x
    x = 121,636,706,289.05/393,668
  6. Step 6: Final answer
    x = 308,982.97

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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.