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Finding the Fourth Proportional to 711,659.88, 981,954.18 and 405,730.44

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Solution

The fourth proportional to 711,659.88, 981,954.18 and 405,730.44 is: 559,830.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,659.88 : 981,954.18 = 405,730.44 : x
  2. Step 2: Convert to fraction form
    711,659.88/981,954.18 = 405,730.44/x
  3. Step 3: Cross multiply
    711,659.88x = 981,954.18 × 405,730.44
  4. Step 4: Simplify right side
    711,659.88x = 398,408,701,511.24
  5. Step 5: Solve for x
    x = 398,408,701,511.24/711,659.88
  6. Step 6: Final answer
    x = 559,830.21

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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.