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Finding the Third Proportional to 411,350 and 621,395

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Solution

The third proportional to 411,350 and 621,395 is: 938,693.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,350 : 621,395 = 621,395 : x
  2. Step 2: Convert to fraction form
    411,350/621,395 = 621,395/x
  3. Step 3: Cross multiply
    411,350x = 621,395 × 621,395
  4. Step 4: Simplify right side
    411,350x = 386,131,746,025
  5. Step 5: Solve for x
    x = 386,131,746,025/411,350
  6. Step 6: Final answer
    x = 938,693.92

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.