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Finding the Fourth Proportional to 1,990,658,469.20, 2,980,612,932.60 and 1,990,658,469.20

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Solution

The fourth proportional to 1,990,658,469.20, 2,980,612,932.60 and 1,990,658,469.20 is: 2,980,612,932.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,658,469.20 : 2,980,612,932.60 = 1,990,658,469.20 : x
  2. Step 2: Convert to fraction form
    1,990,658,469.20/2,980,612,932.60 = 1,990,658,469.20/x
  3. Step 3: Cross multiply
    1,990,658,469.20x = 2,980,612,932.60 × 1,990,658,469.20
  4. Step 4: Simplify right side
    1,990,658,469.20x = 5,933,382,377,687,238,656
  5. Step 5: Solve for x
    x = 5,933,382,377,687,238,656/1,990,658,469.20
  6. Step 6: Final answer
    x = 2,980,612,932.60

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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.