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Finding the Fourth Proportional to 270.81, 405.42 and 267.21

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Solution

The fourth proportional to 270.81, 405.42 and 267.21 is: 400.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.81 : 405.42 = 267.21 : x
  2. Step 2: Convert to fraction form
    270.81/405.42 = 267.21/x
  3. Step 3: Cross multiply
    270.81x = 405.42 × 267.21
  4. Step 4: Simplify right side
    270.81x = 108,330.94
  5. Step 5: Solve for x
    x = 108,330.94/270.81
  6. Step 6: Final answer
    x = 400.03

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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.