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Finding the Third Proportional to 207,476 and 455,128

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Solution

The third proportional to 207,476 and 455,128 is: 998,387.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,476 : 455,128 = 455,128 : x
  2. Step 2: Convert to fraction form
    207,476/455,128 = 455,128/x
  3. Step 3: Cross multiply
    207,476x = 455,128 × 455,128
  4. Step 4: Simplify right side
    207,476x = 207,141,496,384
  5. Step 5: Solve for x
    x = 207,141,496,384/207,476
  6. Step 6: Final answer
    x = 998,387.75

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.