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Finding the Fourth Proportional to 279,938,009.20, 419,907,013.80 and 259,530,674.80

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Solution

The fourth proportional to 279,938,009.20, 419,907,013.80 and 259,530,674.80 is: 389,296,012.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,938,009.20 : 419,907,013.80 = 259,530,674.80 : x
  2. Step 2: Convert to fraction form
    279,938,009.20/419,907,013.80 = 259,530,674.80/x
  3. Step 3: Cross multiply
    279,938,009.20x = 419,907,013.80 × 259,530,674.80
  4. Step 4: Simplify right side
    279,938,009.20x = 108,978,750,644,766,928
  5. Step 5: Solve for x
    x = 108,978,750,644,766,928/279,938,009.20
  6. Step 6: Final answer
    x = 389,296,012.20

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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.