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Finding the Third Proportional to 251.69 and 307.38

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Solution

The third proportional to 251.69 and 307.38 is: 375.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.69 : 307.38 = 307.38 : x
  2. Step 2: Convert to fraction form
    251.69/307.38 = 307.38/x
  3. Step 3: Cross multiply
    251.69x = 307.38 × 307.38
  4. Step 4: Simplify right side
    251.69x = 94,479.39
  5. Step 5: Solve for x
    x = 94,479.39/251.69
  6. Step 6: Final answer
    x = 375.38

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Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.