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Finding the Fourth Proportional to 3,992,601.60, 5,978,404.80 and 2,921,846.40

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Solution

The fourth proportional to 3,992,601.60, 5,978,404.80 and 2,921,846.40 is: 4,375,087.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992,601.60 : 5,978,404.80 = 2,921,846.40 : x
  2. Step 2: Convert to fraction form
    3,992,601.60/5,978,404.80 = 2,921,846.40/x
  3. Step 3: Cross multiply
    3,992,601.60x = 5,978,404.80 × 2,921,846.40
  4. Step 4: Simplify right side
    3,992,601.60x = 17,467,980,542,622.72
  5. Step 5: Solve for x
    x = 17,467,980,542,622.72/3,992,601.60
  6. Step 6: Final answer
    x = 4,375,087.30

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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.