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Finding the Fourth Proportional to 691,999.01, 954,936.98 and 405,709.78

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Solution

The fourth proportional to 691,999.01, 954,936.98 and 405,709.78 is: 559,866.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,999.01 : 954,936.98 = 405,709.78 : x
  2. Step 2: Convert to fraction form
    691,999.01/954,936.98 = 405,709.78/x
  3. Step 3: Cross multiply
    691,999.01x = 954,936.98 × 405,709.78
  4. Step 4: Simplify right side
    691,999.01x = 387,427,272,069.66
  5. Step 5: Solve for x
    x = 387,427,272,069.66/691,999.01
  6. Step 6: Final answer
    x = 559,866.80

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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.