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Finding the Fourth Proportional to 211.06, 316.33 and 119.57

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Solution

The fourth proportional to 211.06, 316.33 and 119.57 is: 179.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.06 : 316.33 = 119.57 : x
  2. Step 2: Convert to fraction form
    211.06/316.33 = 119.57/x
  3. Step 3: Cross multiply
    211.06x = 316.33 × 119.57
  4. Step 4: Simplify right side
    211.06x = 37,823.58
  5. Step 5: Solve for x
    x = 37,823.58/211.06
  6. Step 6: Final answer
    x = 179.21

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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.