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Finding the Fourth Proportional to 5,978,580.60, 8,968,745.70 and 3,138,906.90

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Solution

The fourth proportional to 5,978,580.60, 8,968,745.70 and 3,138,906.90 is: 4,708,819.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,978,580.60 : 8,968,745.70 = 3,138,906.90 : x
  2. Step 2: Convert to fraction form
    5,978,580.60/8,968,745.70 = 3,138,906.90/x
  3. Step 3: Cross multiply
    5,978,580.60x = 8,968,745.70 × 3,138,906.90
  4. Step 4: Simplify right side
    5,978,580.60x = 28,152,057,762,075.33
  5. Step 5: Solve for x
    x = 28,152,057,762,075.33/5,978,580.60
  6. Step 6: Final answer
    x = 4,708,819.64

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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.