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Finding the Third Proportional to 210,867 and 455,412

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Solution

The third proportional to 210,867 and 455,412 is: 983,558.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,867 : 455,412 = 455,412 : x
  2. Step 2: Convert to fraction form
    210,867/455,412 = 455,412/x
  3. Step 3: Cross multiply
    210,867x = 455,412 × 455,412
  4. Step 4: Simplify right side
    210,867x = 207,400,089,744
  5. Step 5: Solve for x
    x = 207,400,089,744/210,867
  6. Step 6: Final answer
    x = 983,558.78

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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.