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Finding the Fourth Proportional to 393,953.20, 590,929.80 and 127,722.40

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Solution

The fourth proportional to 393,953.20, 590,929.80 and 127,722.40 is: 191,583.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,953.20 : 590,929.80 = 127,722.40 : x
  2. Step 2: Convert to fraction form
    393,953.20/590,929.80 = 127,722.40/x
  3. Step 3: Cross multiply
    393,953.20x = 590,929.80 × 127,722.40
  4. Step 4: Simplify right side
    393,953.20x = 75,474,972,287.52
  5. Step 5: Solve for x
    x = 75,474,972,287.52/393,953.20
  6. Step 6: Final answer
    x = 191,583.60

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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.