Home / 1,990,658,775.40-2,985,988,163.10-1,978,565,540.20

Finding the Fourth Proportional to 1,990,658,775.40, 2,985,988,163.10 and 1,978,565,540.20

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Solution

The fourth proportional to 1,990,658,775.40, 2,985,988,163.10 and 1,978,565,540.20 is: 2,967,848,310.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,658,775.40 : 2,985,988,163.10 = 1,978,565,540.20 : x
  2. Step 2: Convert to fraction form
    1,990,658,775.40/2,985,988,163.10 = 1,978,565,540.20/x
  3. Step 3: Cross multiply
    1,990,658,775.40x = 2,985,988,163.10 × 1,978,565,540.20
  4. Step 4: Simplify right side
    1,990,658,775.40x = 5,907,973,282,954,757,120
  5. Step 5: Solve for x
    x = 5,907,973,282,954,757,120/1,990,658,775.40
  6. Step 6: Final answer
    x = 2,967,848,310.30

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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.