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Finding the Third Proportional to 660.75 and 890.06

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Solution

The third proportional to 660.75 and 890.06 is: 1,198.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.75 : 890.06 = 890.06 : x
  2. Step 2: Convert to fraction form
    660.75/890.06 = 890.06/x
  3. Step 3: Cross multiply
    660.75x = 890.06 × 890.06
  4. Step 4: Simplify right side
    660.75x = 792,211.25
  5. Step 5: Solve for x
    x = 792,211.25/660.75
  6. Step 6: Final answer
    x = 1,198.96

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.