Home / 355,012,399.84-489,907,987.20-198,380,793.60

Finding the Fourth Proportional to 355,012,399.84, 489,907,987.20 and 198,380,793.60

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Solution

The fourth proportional to 355,012,399.84, 489,907,987.20 and 198,380,793.60 is: 273,760,396.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,012,399.84 : 489,907,987.20 = 198,380,793.60 : x
  2. Step 2: Convert to fraction form
    355,012,399.84/489,907,987.20 = 198,380,793.60/x
  3. Step 3: Cross multiply
    355,012,399.84x = 489,907,987.20 × 198,380,793.60
  4. Step 4: Simplify right side
    355,012,399.84x = 97,188,335,291,714,640
  5. Step 5: Solve for x
    x = 97,188,335,291,714,640/355,012,399.84
  6. Step 6: Final answer
    x = 273,760,396.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.