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Finding the Third Proportional to 694.50 and 1,485.75

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Solution

The third proportional to 694.50 and 1,485.75 is: 3,178.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.50 : 1,485.75 = 1,485.75 : x
  2. Step 2: Convert to fraction form
    694.50/1,485.75 = 1,485.75/x
  3. Step 3: Cross multiply
    694.50x = 1,485.75 × 1,485.75
  4. Step 4: Simplify right side
    694.50x = 2,207,453.06
  5. Step 5: Solve for x
    x = 2,207,453.06/694.50
  6. Step 6: Final answer
    x = 3,178.48

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.