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Finding the Fourth Proportional to 211.26, 316.61 and 113.52

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Solution

The fourth proportional to 211.26, 316.61 and 113.52 is: 170.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.26 : 316.61 = 113.52 : x
  2. Step 2: Convert to fraction form
    211.26/316.61 = 113.52/x
  3. Step 3: Cross multiply
    211.26x = 316.61 × 113.52
  4. Step 4: Simplify right side
    211.26x = 35,940.83
  5. Step 5: Solve for x
    x = 35,940.83/211.26
  6. Step 6: Final answer
    x = 170.13

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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.