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Finding the Fourth Proportional to 211.26, 315.96 and 162.36

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Solution

The fourth proportional to 211.26, 315.96 and 162.36 is: 242.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.26 : 315.96 = 162.36 : x
  2. Step 2: Convert to fraction form
    211.26/315.96 = 162.36/x
  3. Step 3: Cross multiply
    211.26x = 315.96 × 162.36
  4. Step 4: Simplify right side
    211.26x = 51,299.27
  5. Step 5: Solve for x
    x = 51,299.27/211.26
  6. Step 6: Final answer
    x = 242.83

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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.