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Finding the Third Proportional to 190,813 and 280,385

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Solution

The third proportional to 190,813 and 280,385 is: 412,004.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,813 : 280,385 = 280,385 : x
  2. Step 2: Convert to fraction form
    190,813/280,385 = 280,385/x
  3. Step 3: Cross multiply
    190,813x = 280,385 × 280,385
  4. Step 4: Simplify right side
    190,813x = 78,615,748,225
  5. Step 5: Solve for x
    x = 78,615,748,225/190,813
  6. Step 6: Final answer
    x = 412,004.15

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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.