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Finding the Fourth Proportional to 1,990,659,324.60, 2,985,988,986.90 and 697,728,252.60

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Solution

The fourth proportional to 1,990,659,324.60, 2,985,988,986.90 and 697,728,252.60 is: 1,046,592,378.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990,659,324.60 : 2,985,988,986.90 = 697,728,252.60 : x
  2. Step 2: Convert to fraction form
    1,990,659,324.60/2,985,988,986.90 = 697,728,252.60/x
  3. Step 3: Cross multiply
    1,990,659,324.60x = 2,985,988,986.90 × 697,728,252.60
  4. Step 4: Simplify right side
    1,990,659,324.60x = 2,083,408,878,112,581,376
  5. Step 5: Solve for x
    x = 2,083,408,878,112,581,376/1,990,659,324.60
  6. Step 6: Final answer
    x = 1,046,592,378.90

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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.