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Finding the Fourth Proportional to 396.57, 594.85 and 215.11

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Solution

The fourth proportional to 396.57, 594.85 and 215.11 is: 322.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.57 : 594.85 = 215.11 : x
  2. Step 2: Convert to fraction form
    396.57/594.85 = 215.11/x
  3. Step 3: Cross multiply
    396.57x = 594.85 × 215.11
  4. Step 4: Simplify right side
    396.57x = 127,959.20
  5. Step 5: Solve for x
    x = 127,959.20/396.57
  6. Step 6: Final answer
    x = 322.67

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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.