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Finding the Third Proportional to 98,939 and 217,480

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Solution

The third proportional to 98,939 and 217,480 is: 478,047.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,939 : 217,480 = 217,480 : x
  2. Step 2: Convert to fraction form
    98,939/217,480 = 217,480/x
  3. Step 3: Cross multiply
    98,939x = 217,480 × 217,480
  4. Step 4: Simplify right side
    98,939x = 47,297,550,400
  5. Step 5: Solve for x
    x = 47,297,550,400/98,939
  6. Step 6: Final answer
    x = 478,047.59

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.