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Finding the Fourth Proportional to 619,405.55, 854,896.36 and 404,171.95

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Solution

The fourth proportional to 619,405.55, 854,896.36 and 404,171.95 is: 557,833.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,405.55 : 854,896.36 = 404,171.95 : x
  2. Step 2: Convert to fraction form
    619,405.55/854,896.36 = 404,171.95/x
  3. Step 3: Cross multiply
    619,405.55x = 854,896.36 × 404,171.95
  4. Step 4: Simplify right side
    619,405.55x = 345,525,128,869.10
  5. Step 5: Solve for x
    x = 345,525,128,869.10/619,405.55
  6. Step 6: Final answer
    x = 557,833.44

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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.