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Finding the Fourth Proportional to 4,978,555.20, 7,467,832.80 and 4,978,555.20

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Solution

The fourth proportional to 4,978,555.20, 7,467,832.80 and 4,978,555.20 is: 7,467,832.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978,555.20 : 7,467,832.80 = 4,978,555.20 : x
  2. Step 2: Convert to fraction form
    4,978,555.20/7,467,832.80 = 4,978,555.20/x
  3. Step 3: Cross multiply
    4,978,555.20x = 7,467,832.80 × 4,978,555.20
  4. Step 4: Simplify right side
    4,978,555.20x = 37,179,017,819,170.56
  5. Step 5: Solve for x
    x = 37,179,017,819,170.56/4,978,555.20
  6. Step 6: Final answer
    x = 7,467,832.80

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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.