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Finding the Fourth Proportional to 396.66, 546.99 and 286.08

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Solution

The fourth proportional to 396.66, 546.99 and 286.08 is: 394.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    396.66 : 546.99 = 286.08 : x
  2. Step 2: Convert to fraction form
    396.66/546.99 = 286.08/x
  3. Step 3: Cross multiply
    396.66x = 546.99 × 286.08
  4. Step 4: Simplify right side
    396.66x = 156,482.90
  5. Step 5: Solve for x
    x = 156,482.90/396.66
  6. Step 6: Final answer
    x = 394.50

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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.