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Finding the Fourth Proportional to 393,805.11, 590,679.12 and 153,873.90

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Solution

The fourth proportional to 393,805.11, 590,679.12 and 153,873.90 is: 230,799.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,805.11 : 590,679.12 = 153,873.90 : x
  2. Step 2: Convert to fraction form
    393,805.11/590,679.12 = 153,873.90/x
  3. Step 3: Cross multiply
    393,805.11x = 590,679.12 × 153,873.90
  4. Step 4: Simplify right side
    393,805.11x = 90,890,099,842.97
  5. Step 5: Solve for x
    x = 90,890,099,842.97/393,805.11
  6. Step 6: Final answer
    x = 230,799.70

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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.