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Finding the Third Proportional to 999.84 and 1,121.34

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Solution

The third proportional to 999.84 and 1,121.34 is: 1,257.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    999.84 : 1,121.34 = 1,121.34 : x
  2. Step 2: Convert to fraction form
    999.84/1,121.34 = 1,121.34/x
  3. Step 3: Cross multiply
    999.84x = 1,121.34 × 1,121.34
  4. Step 4: Simplify right side
    999.84x = 1,257,411.81
  5. Step 5: Solve for x
    x = 1,257,411.81/999.84
  6. Step 6: Final answer
    x = 1,257.61

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Why These Related Problems?

These problems maintain the same ratio (1.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.