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Finding the Fourth Proportional to 298,972,608.60, 448,458,912.90 and 137,729,472.60

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Solution

The fourth proportional to 298,972,608.60, 448,458,912.90 and 137,729,472.60 is: 206,594,208.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,972,608.60 : 448,458,912.90 = 137,729,472.60 : x
  2. Step 2: Convert to fraction form
    298,972,608.60/448,458,912.90 = 137,729,472.60/x
  3. Step 3: Cross multiply
    298,972,608.60x = 448,458,912.90 × 137,729,472.60
  4. Step 4: Simplify right side
    298,972,608.60x = 61,766,009,556,486,328
  5. Step 5: Solve for x
    x = 61,766,009,556,486,328/298,972,608.60
  6. Step 6: Final answer
    x = 206,594,208.90

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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.