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Finding the Fourth Proportional to 5,177,438.81, 7,764,467.81 and 1,718,249.21

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Solution

The fourth proportional to 5,177,438.81, 7,764,467.81 and 1,718,249.21 is: 2,576,812.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,177,438.81 : 7,764,467.81 = 1,718,249.21 : x
  2. Step 2: Convert to fraction form
    5,177,438.81/7,764,467.81 = 1,718,249.21/x
  3. Step 3: Cross multiply
    5,177,438.81x = 7,764,467.81 × 1,718,249.21
  4. Step 4: Simplify right side
    5,177,438.81x = 13,341,290,633,189.35
  5. Step 5: Solve for x
    x = 13,341,290,633,189.35/5,177,438.81
  6. Step 6: Final answer
    x = 2,576,812.81

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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.