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Finding the Fourth Proportional to 286.64, 395.88 and 217.04

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Solution

The fourth proportional to 286.64, 395.88 and 217.04 is: 299.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.64 : 395.88 = 217.04 : x
  2. Step 2: Convert to fraction form
    286.64/395.88 = 217.04/x
  3. Step 3: Cross multiply
    286.64x = 395.88 × 217.04
  4. Step 4: Simplify right side
    286.64x = 85,921.80
  5. Step 5: Solve for x
    x = 85,921.80/286.64
  6. Step 6: Final answer
    x = 299.76

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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.