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Finding the Third Proportional to 307.97 and 624.80

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Solution

The third proportional to 307.97 and 624.80 is: 1,267.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.97 : 624.80 = 624.80 : x
  2. Step 2: Convert to fraction form
    307.97/624.80 = 624.80/x
  3. Step 3: Cross multiply
    307.97x = 624.80 × 624.80
  4. Step 4: Simplify right side
    307.97x = 390,371.14
  5. Step 5: Solve for x
    x = 390,371.14/307.97
  6. Step 6: Final answer
    x = 1,267.57

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Why These Related Problems?

These problems maintain the same ratio (2.03) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.