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Finding the Third Proportional to 990,494 and 2,138,620

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Solution

The third proportional to 990,494 and 2,138,620 is: 4,617,590.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,494 : 2,138,620 = 2,138,620 : x
  2. Step 2: Convert to fraction form
    990,494/2,138,620 = 2,138,620/x
  3. Step 3: Cross multiply
    990,494x = 2,138,620 × 2,138,620
  4. Step 4: Simplify right side
    990,494x = 4,573,695,504,400
  5. Step 5: Solve for x
    x = 4,573,695,504,400/990,494
  6. Step 6: Final answer
    x = 4,617,590.32

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.