Home / 431,340,400.80-647,010,601.20-388,342,231.20

Finding the Fourth Proportional to 431,340,400.80, 647,010,601.20 and 388,342,231.20

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Solution

The fourth proportional to 431,340,400.80, 647,010,601.20 and 388,342,231.20 is: 582,513,346.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,340,400.80 : 647,010,601.20 = 388,342,231.20 : x
  2. Step 2: Convert to fraction form
    431,340,400.80/647,010,601.20 = 388,342,231.20/x
  3. Step 3: Cross multiply
    431,340,400.80x = 647,010,601.20 × 388,342,231.20
  4. Step 4: Simplify right side
    431,340,400.80x = 251,261,540,480,061,408
  5. Step 5: Solve for x
    x = 251,261,540,480,061,408/431,340,400.80
  6. Step 6: Final answer
    x = 582,513,346.80

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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.