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Finding the Fourth Proportional to 396.15, 546.15 and 277.96

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Solution

The fourth proportional to 396.15, 546.15 and 277.96 is: 383.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.15 : 546.15 = 277.96 : x
  2. Step 2: Convert to fraction form
    396.15/546.15 = 277.96/x
  3. Step 3: Cross multiply
    396.15x = 546.15 × 277.96
  4. Step 4: Simplify right side
    396.15x = 151,807.85
  5. Step 5: Solve for x
    x = 151,807.85/396.15
  6. Step 6: Final answer
    x = 383.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.