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Finding the Fourth Proportional to 6,979,978.20, 10,478,496.60 and 3,949,452.30

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Solution

The fourth proportional to 6,979,978.20, 10,478,496.60 and 3,949,452.30 is: 5,929,004.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,979,978.20 : 10,478,496.60 = 3,949,452.30 : x
  2. Step 2: Convert to fraction form
    6,979,978.20/10,478,496.60 = 3,949,452.30/x
  3. Step 3: Cross multiply
    6,979,978.20x = 10,478,496.60 × 3,949,452.30
  4. Step 4: Simplify right side
    6,979,978.20x = 41,384,322,497,412.18
  5. Step 5: Solve for x
    x = 41,384,322,497,412.18/6,979,978.20
  6. Step 6: Final answer
    x = 5,929,004.55

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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.