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Finding the Fourth Proportional to 211.28, 291.84 and 195.44

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Solution

The fourth proportional to 211.28, 291.84 and 195.44 is: 269.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.28 : 291.84 = 195.44 : x
  2. Step 2: Convert to fraction form
    211.28/291.84 = 195.44/x
  3. Step 3: Cross multiply
    211.28x = 291.84 × 195.44
  4. Step 4: Simplify right side
    211.28x = 57,037.21
  5. Step 5: Solve for x
    x = 57,037.21/211.28
  6. Step 6: Final answer
    x = 269.96

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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.