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Finding the Fourth Proportional to 711,540.90, 981,949.68 and 405,611.69

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Solution

The fourth proportional to 711,540.90, 981,949.68 and 405,611.69 is: 559,757.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,540.90 : 981,949.68 = 405,611.69 : x
  2. Step 2: Convert to fraction form
    711,540.90/981,949.68 = 405,611.69/x
  3. Step 3: Cross multiply
    711,540.90x = 981,949.68 × 405,611.69
  4. Step 4: Simplify right side
    711,540.90x = 398,290,264,290.01
  5. Step 5: Solve for x
    x = 398,290,264,290.01/711,540.90
  6. Step 6: Final answer
    x = 559,757.37

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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.