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Finding the Fourth Proportional to 267.21, 399.83 and 228.18

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Solution

The fourth proportional to 267.21, 399.83 and 228.18 is: 341.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.21 : 399.83 = 228.18 : x
  2. Step 2: Convert to fraction form
    267.21/399.83 = 228.18/x
  3. Step 3: Cross multiply
    267.21x = 399.83 × 228.18
  4. Step 4: Simplify right side
    267.21x = 91,231.07
  5. Step 5: Solve for x
    x = 91,231.07/267.21
  6. Step 6: Final answer
    x = 341.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.