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Finding the Fourth Proportional to 647,296.62, 892,903.56 and 405,158.82

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Solution

The fourth proportional to 647,296.62, 892,903.56 and 405,158.82 is: 558,890.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,296.62 : 892,903.56 = 405,158.82 : x
  2. Step 2: Convert to fraction form
    647,296.62/892,903.56 = 405,158.82/x
  3. Step 3: Cross multiply
    647,296.62x = 892,903.56 × 405,158.82
  4. Step 4: Simplify right side
    647,296.62x = 361,767,752,743.40
  5. Step 5: Solve for x
    x = 361,767,752,743.40/647,296.62
  6. Step 6: Final answer
    x = 558,890.22

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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.