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Finding the Fourth Proportional to 3,885,391.81, 5,828,101.56 and 1,189,705.79

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Solution

The fourth proportional to 3,885,391.81, 5,828,101.56 and 1,189,705.79 is: 1,784,562.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,885,391.81 : 5,828,101.56 = 1,189,705.79 : x
  2. Step 2: Convert to fraction form
    3,885,391.81/5,828,101.56 = 1,189,705.79/x
  3. Step 3: Cross multiply
    3,885,391.81x = 5,828,101.56 × 1,189,705.79
  4. Step 4: Simplify right side
    3,885,391.81x = 6,933,726,158,950.55
  5. Step 5: Solve for x
    x = 6,933,726,158,950.55/3,885,391.81
  6. Step 6: Final answer
    x = 1,784,562.92

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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.