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Finding the Third Proportional to 455,330 and 990,983

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Solution

The third proportional to 455,330 and 990,983 is: 2,156,781.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,330 : 990,983 = 990,983 : x
  2. Step 2: Convert to fraction form
    455,330/990,983 = 990,983/x
  3. Step 3: Cross multiply
    455,330x = 990,983 × 990,983
  4. Step 4: Simplify right side
    455,330x = 982,047,306,289
  5. Step 5: Solve for x
    x = 982,047,306,289/455,330
  6. Step 6: Final answer
    x = 2,156,781.47

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.