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Finding the Third Proportional to 190,539 and 280,107

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Solution

The third proportional to 190,539 and 280,107 is: 411,778.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,539 : 280,107 = 280,107 : x
  2. Step 2: Convert to fraction form
    190,539/280,107 = 280,107/x
  3. Step 3: Cross multiply
    190,539x = 280,107 × 280,107
  4. Step 4: Simplify right side
    190,539x = 78,459,931,449
  5. Step 5: Solve for x
    x = 78,459,931,449/190,539
  6. Step 6: Final answer
    x = 411,778.86

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.