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Finding the Fourth Proportional to 396.59, 546.71 and 278.19

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Solution

The fourth proportional to 396.59, 546.71 and 278.19 is: 383.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.59 : 546.71 = 278.19 : x
  2. Step 2: Convert to fraction form
    396.59/546.71 = 278.19/x
  3. Step 3: Cross multiply
    396.59x = 546.71 × 278.19
  4. Step 4: Simplify right side
    396.59x = 152,089.25
  5. Step 5: Solve for x
    x = 152,089.25/396.59
  6. Step 6: Final answer
    x = 383.49

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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.