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Finding the Fourth Proportional to 213.36, 318.20 and 195.67

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Solution

The fourth proportional to 213.36, 318.20 and 195.67 is: 291.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.36 : 318.20 = 195.67 : x
  2. Step 2: Convert to fraction form
    213.36/318.20 = 195.67/x
  3. Step 3: Cross multiply
    213.36x = 318.20 × 195.67
  4. Step 4: Simplify right side
    213.36x = 62,262.19
  5. Step 5: Solve for x
    x = 62,262.19/213.36
  6. Step 6: Final answer
    x = 291.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.