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Finding the Fourth Proportional to 6,664,653.81, 9,997,323.08 and 1,872,716.76

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Solution

The fourth proportional to 6,664,653.81, 9,997,323.08 and 1,872,716.76 is: 2,809,171.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,664,653.81 : 9,997,323.08 = 1,872,716.76 : x
  2. Step 2: Convert to fraction form
    6,664,653.81/9,997,323.08 = 1,872,716.76/x
  3. Step 3: Cross multiply
    6,664,653.81x = 9,997,323.08 × 1,872,716.76
  4. Step 4: Simplify right side
    6,664,653.81x = 18,722,154,477,687.23
  5. Step 5: Solve for x
    x = 18,722,154,477,687.23/6,664,653.81
  6. Step 6: Final answer
    x = 2,809,171.34

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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.