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Finding the Fourth Proportional to 1,909,691,879.80, 2,864,537,819.70 and 1,819,293,765.70

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Solution

The fourth proportional to 1,909,691,879.80, 2,864,537,819.70 and 1,819,293,765.70 is: 2,728,940,648.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909,691,879.80 : 2,864,537,819.70 = 1,819,293,765.70 : x
  2. Step 2: Convert to fraction form
    1,909,691,879.80/2,864,537,819.70 = 1,819,293,765.70/x
  3. Step 3: Cross multiply
    1,909,691,879.80x = 2,864,537,819.70 × 1,819,293,765.70
  4. Step 4: Simplify right side
    1,909,691,879.80x = 5,211,435,796,992,080,896
  5. Step 5: Solve for x
    x = 5,211,435,796,992,080,896/1,909,691,879.80
  6. Step 6: Final answer
    x = 2,728,940,648.55

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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.