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Finding the Third Proportional to 198,554 and 428,210

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Solution

The third proportional to 198,554 and 428,210 is: 923,495.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,554 : 428,210 = 428,210 : x
  2. Step 2: Convert to fraction form
    198,554/428,210 = 428,210/x
  3. Step 3: Cross multiply
    198,554x = 428,210 × 428,210
  4. Step 4: Simplify right side
    198,554x = 183,363,804,100
  5. Step 5: Solve for x
    x = 183,363,804,100/198,554
  6. Step 6: Final answer
    x = 923,495.90

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.