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Finding the Third Proportional to 210,647,990 and 279,507,405

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Solution

The third proportional to 210,647,990 and 279,507,405 is: 370,876,500.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,647,990 : 279,507,405 = 279,507,405 : x
  2. Step 2: Convert to fraction form
    210,647,990/279,507,405 = 279,507,405/x
  3. Step 3: Cross multiply
    210,647,990x = 279,507,405 × 279,507,405
  4. Step 4: Simplify right side
    210,647,990x = 78,124,389,449,834,032
  5. Step 5: Solve for x
    x = 78,124,389,449,834,032/210,647,990
  6. Step 6: Final answer
    x = 370,876,500.89

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.