Home / 1,979,562,780.78-2,971,939,264.32-1,327,431,861.78

Finding the Fourth Proportional to 1,979,562,780.78, 2,971,939,264.32 and 1,327,431,861.78

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Solution

The fourth proportional to 1,979,562,780.78, 2,971,939,264.32 and 1,327,431,861.78 is: 1,992,887,979.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979,562,780.78 : 2,971,939,264.32 = 1,327,431,861.78 : x
  2. Step 2: Convert to fraction form
    1,979,562,780.78/2,971,939,264.32 = 1,327,431,861.78/x
  3. Step 3: Cross multiply
    1,979,562,780.78x = 2,971,939,264.32 × 1,327,431,861.78
  4. Step 4: Simplify right side
    1,979,562,780.78x = 3,945,046,870,733,381,120
  5. Step 5: Solve for x
    x = 3,945,046,870,733,381,120/1,979,562,780.78
  6. Step 6: Final answer
    x = 1,992,887,979.63

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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.