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Finding the Third Proportional to 455,008.50 and 990,690.75

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Solution

The third proportional to 455,008.50 and 990,690.75 is: 2,157,032.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,008.50 : 990,690.75 = 990,690.75 : x
  2. Step 2: Convert to fraction form
    455,008.50/990,690.75 = 990,690.75/x
  3. Step 3: Cross multiply
    455,008.50x = 990,690.75 × 990,690.75
  4. Step 4: Simplify right side
    455,008.50x = 981,468,162,135.56
  5. Step 5: Solve for x
    x = 981,468,162,135.56/455,008.50
  6. Step 6: Final answer
    x = 2,157,032.59

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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.