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Finding the Fourth Proportional to 393,764.76, 590,705.10 and 127,436.76

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Solution

The fourth proportional to 393,764.76, 590,705.10 and 127,436.76 is: 191,173.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,764.76 : 590,705.10 = 127,436.76 : x
  2. Step 2: Convert to fraction form
    393,764.76/590,705.10 = 127,436.76/x
  3. Step 3: Cross multiply
    393,764.76x = 590,705.10 × 127,436.76
  4. Step 4: Simplify right side
    393,764.76x = 75,277,544,059.48
  5. Step 5: Solve for x
    x = 75,277,544,059.48/393,764.76
  6. Step 6: Final answer
    x = 191,173.90

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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.