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Finding the Fourth Proportional to 225.81, 336.42 and 211.83

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Solution

The fourth proportional to 225.81, 336.42 and 211.83 is: 315.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    225.81 : 336.42 = 211.83 : x
  2. Step 2: Convert to fraction form
    225.81/336.42 = 211.83/x
  3. Step 3: Cross multiply
    225.81x = 336.42 × 211.83
  4. Step 4: Simplify right side
    225.81x = 71,263.85
  5. Step 5: Solve for x
    x = 71,263.85/225.81
  6. Step 6: Final answer
    x = 315.59

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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.