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Finding the Fourth Proportional to 396.99, 594.66 and 319.53

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Solution

The fourth proportional to 396.99, 594.66 and 319.53 is: 478.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.99 : 594.66 = 319.53 : x
  2. Step 2: Convert to fraction form
    396.99/594.66 = 319.53/x
  3. Step 3: Cross multiply
    396.99x = 594.66 × 319.53
  4. Step 4: Simplify right side
    396.99x = 190,011.71
  5. Step 5: Solve for x
    x = 190,011.71/396.99
  6. Step 6: Final answer
    x = 478.63

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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.