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Finding the Third Proportional to 201,890 and 313,486

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Solution

The third proportional to 201,890 and 313,486 is: 486,767.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,890 : 313,486 = 313,486 : x
  2. Step 2: Convert to fraction form
    201,890/313,486 = 313,486/x
  3. Step 3: Cross multiply
    201,890x = 313,486 × 313,486
  4. Step 4: Simplify right side
    201,890x = 98,273,472,196
  5. Step 5: Solve for x
    x = 98,273,472,196/201,890
  6. Step 6: Final answer
    x = 486,767.41

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.