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Finding the Fourth Proportional to 396.41, 594.69 and 319.87

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Solution

The fourth proportional to 396.41, 594.69 and 319.87 is: 479.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.41 : 594.69 = 319.87 : x
  2. Step 2: Convert to fraction form
    396.41/594.69 = 319.87/x
  3. Step 3: Cross multiply
    396.41x = 594.69 × 319.87
  4. Step 4: Simplify right side
    396.41x = 190,223.49
  5. Step 5: Solve for x
    x = 190,223.49/396.41
  6. Step 6: Final answer
    x = 479.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.