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Finding the Third Proportional to 98,658 and 216,999

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Solution

The third proportional to 98,658 and 216,999 is: 477,290.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,658 : 216,999 = 216,999 : x
  2. Step 2: Convert to fraction form
    98,658/216,999 = 216,999/x
  3. Step 3: Cross multiply
    98,658x = 216,999 × 216,999
  4. Step 4: Simplify right side
    98,658x = 47,088,566,001
  5. Step 5: Solve for x
    x = 47,088,566,001/98,658
  6. Step 6: Final answer
    x = 477,290.90

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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.