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Finding the Fourth Proportional to 396, 546.60 and 265.44

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Solution

The fourth proportional to 396, 546.60 and 265.44 is: 366.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    396 : 546.60 = 265.44 : x
  2. Step 2: Convert to fraction form
    396/546.60 = 265.44/x
  3. Step 3: Cross multiply
    396x = 546.60 × 265.44
  4. Step 4: Simplify right side
    396x = 145,089.50
  5. Step 5: Solve for x
    x = 145,089.50/396
  6. Step 6: Final answer
    x = 366.39

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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.