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Finding the Fourth Proportional to 680,768.67, 939,046.26 and 419,166.06

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Solution

The fourth proportional to 680,768.67, 939,046.26 and 419,166.06 is: 578,193.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,768.67 : 939,046.26 = 419,166.06 : x
  2. Step 2: Convert to fraction form
    680,768.67/939,046.26 = 419,166.06/x
  3. Step 3: Cross multiply
    680,768.67x = 939,046.26 × 419,166.06
  4. Step 4: Simplify right side
    680,768.67x = 393,616,320,961.94
  5. Step 5: Solve for x
    x = 393,616,320,961.94/680,768.67
  6. Step 6: Final answer
    x = 578,193.94

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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.