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Finding the Third Proportional to 990.75 and 2,090.25

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Solution

The third proportional to 990.75 and 2,090.25 is: 4,409.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.75 : 2,090.25 = 2,090.25 : x
  2. Step 2: Convert to fraction form
    990.75/2,090.25 = 2,090.25/x
  3. Step 3: Cross multiply
    990.75x = 2,090.25 × 2,090.25
  4. Step 4: Simplify right side
    990.75x = 4,369,145.06
  5. Step 5: Solve for x
    x = 4,369,145.06/990.75
  6. Step 6: Final answer
    x = 4,409.94

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.