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Finding the Third Proportional to 989.25 and 2,100.25

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Solution

The third proportional to 989.25 and 2,100.25 is: 4,458.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.25 : 2,100.25 = 2,100.25 : x
  2. Step 2: Convert to fraction form
    989.25/2,100.25 = 2,100.25/x
  3. Step 3: Cross multiply
    989.25x = 2,100.25 × 2,100.25
  4. Step 4: Simplify right side
    989.25x = 4,411,050.06
  5. Step 5: Solve for x
    x = 4,411,050.06/989.25
  6. Step 6: Final answer
    x = 4,458.98

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.