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Finding the Fourth Proportional to 288.82, 398.82 and 267.90

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Solution

The fourth proportional to 288.82, 398.82 and 267.90 is: 369.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.82 : 398.82 = 267.90 : x
  2. Step 2: Convert to fraction form
    288.82/398.82 = 267.90/x
  3. Step 3: Cross multiply
    288.82x = 398.82 × 267.90
  4. Step 4: Simplify right side
    288.82x = 106,843.88
  5. Step 5: Solve for x
    x = 106,843.88/288.82
  6. Step 6: Final answer
    x = 369.93

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.