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Finding the Third Proportional to 307.25 and 668.50

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Solution

The third proportional to 307.25 and 668.50 is: 1,454.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.25 : 668.50 = 668.50 : x
  2. Step 2: Convert to fraction form
    307.25/668.50 = 668.50/x
  3. Step 3: Cross multiply
    307.25x = 668.50 × 668.50
  4. Step 4: Simplify right side
    307.25x = 446,892.25
  5. Step 5: Solve for x
    x = 446,892.25/307.25
  6. Step 6: Final answer
    x = 1,454.49

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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.