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Finding the Third Proportional to 307.25 and 668.75

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Solution

The third proportional to 307.25 and 668.75 is: 1,455.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.25 : 668.75 = 668.75 : x
  2. Step 2: Convert to fraction form
    307.25/668.75 = 668.75/x
  3. Step 3: Cross multiply
    307.25x = 668.75 × 668.75
  4. Step 4: Simplify right side
    307.25x = 447,226.56
  5. Step 5: Solve for x
    x = 447,226.56/307.25
  6. Step 6: Final answer
    x = 1,455.58

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.