Home / 386,629,643.20-579,944,464.80-131,328,011.20

Finding the Fourth Proportional to 386,629,643.20, 579,944,464.80 and 131,328,011.20

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Solution

The fourth proportional to 386,629,643.20, 579,944,464.80 and 131,328,011.20 is: 196,992,016.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,629,643.20 : 579,944,464.80 = 131,328,011.20 : x
  2. Step 2: Convert to fraction form
    386,629,643.20/579,944,464.80 = 131,328,011.20/x
  3. Step 3: Cross multiply
    386,629,643.20x = 579,944,464.80 × 131,328,011.20
  4. Step 4: Simplify right side
    386,629,643.20x = 76,162,953,168,632,400
  5. Step 5: Solve for x
    x = 76,162,953,168,632,400/386,629,643.20
  6. Step 6: Final answer
    x = 196,992,016.80

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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.