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Finding the Fourth Proportional to 1,939,728.60, 2,909,413.38 and 914,823.88

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Solution

The fourth proportional to 1,939,728.60, 2,909,413.38 and 914,823.88 is: 1,372,151.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939,728.60 : 2,909,413.38 = 914,823.88 : x
  2. Step 2: Convert to fraction form
    1,939,728.60/2,909,413.38 = 914,823.88/x
  3. Step 3: Cross multiply
    1,939,728.60x = 2,909,413.38 × 914,823.88
  4. Step 4: Simplify right side
    1,939,728.60x = 2,661,600,836,815.51
  5. Step 5: Solve for x
    x = 2,661,600,836,815.51/1,939,728.60
  6. Step 6: Final answer
    x = 1,372,151.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.