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Finding the Fourth Proportional to 1,393,845.66, 1,923,703.62 and 813,260.34

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Solution

The fourth proportional to 1,393,845.66, 1,923,703.62 and 813,260.34 is: 1,122,413.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393,845.66 : 1,923,703.62 = 813,260.34 : x
  2. Step 2: Convert to fraction form
    1,393,845.66/1,923,703.62 = 813,260.34/x
  3. Step 3: Cross multiply
    1,393,845.66x = 1,923,703.62 × 813,260.34
  4. Step 4: Simplify right side
    1,393,845.66x = 1,564,471,860,060.43
  5. Step 5: Solve for x
    x = 1,564,471,860,060.43/1,393,845.66
  6. Step 6: Final answer
    x = 1,122,413.98

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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.