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Finding the Fourth Proportional to 299,383,212.80, 449,074,819.20 and 218,761,644.80

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Solution

The fourth proportional to 299,383,212.80, 449,074,819.20 and 218,761,644.80 is: 328,142,467.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,383,212.80 : 449,074,819.20 = 218,761,644.80 : x
  2. Step 2: Convert to fraction form
    299,383,212.80/449,074,819.20 = 218,761,644.80/x
  3. Step 3: Cross multiply
    299,383,212.80x = 449,074,819.20 × 218,761,644.80
  4. Step 4: Simplify right side
    299,383,212.80x = 98,240,346,086,454,624
  5. Step 5: Solve for x
    x = 98,240,346,086,454,624/299,383,212.80
  6. Step 6: Final answer
    x = 328,142,467.20

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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.