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Finding the Fourth Proportional to 681,025.06, 939,905.43 and 440,009

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Solution

The fourth proportional to 681,025.06, 939,905.43 and 440,009 is: 607,271.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,025.06 : 939,905.43 = 440,009 : x
  2. Step 2: Convert to fraction form
    681,025.06/939,905.43 = 440,009/x
  3. Step 3: Cross multiply
    681,025.06x = 939,905.43 × 440,009
  4. Step 4: Simplify right side
    681,025.06x = 413,566,848,348.87
  5. Step 5: Solve for x
    x = 413,566,848,348.87/681,025.06
  6. Step 6: Final answer
    x = 607,271.12

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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.