Home / 1,990,658,666.40-2,985,987,999.60-1,978,565,431.20

Finding the Fourth Proportional to 1,990,658,666.40, 2,985,987,999.60 and 1,978,565,431.20

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Solution

The fourth proportional to 1,990,658,666.40, 2,985,987,999.60 and 1,978,565,431.20 is: 2,967,848,146.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,658,666.40 : 2,985,987,999.60 = 1,978,565,431.20 : x
  2. Step 2: Convert to fraction form
    1,990,658,666.40/2,985,987,999.60 = 1,978,565,431.20/x
  3. Step 3: Cross multiply
    1,990,658,666.40x = 2,985,987,999.60 × 1,978,565,431.20
  4. Step 4: Simplify right side
    1,990,658,666.40x = 5,907,972,633,986,598,912
  5. Step 5: Solve for x
    x = 5,907,972,633,986,598,912/1,990,658,666.40
  6. Step 6: Final answer
    x = 2,967,848,146.80

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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.