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Finding the Third Proportional to 396.69 and 589.69

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Solution

The third proportional to 396.69 and 589.69 is: 876.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.69 : 589.69 = 589.69 : x
  2. Step 2: Convert to fraction form
    396.69/589.69 = 589.69/x
  3. Step 3: Cross multiply
    396.69x = 589.69 × 589.69
  4. Step 4: Simplify right side
    396.69x = 347,731.35
  5. Step 5: Solve for x
    x = 347,731.35/396.69
  6. Step 6: Final answer
    x = 876.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.