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Finding the Fourth Proportional to 338.50, 466.74 and 221.86

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Solution

The fourth proportional to 338.50, 466.74 and 221.86 is: 305.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.50 : 466.74 = 221.86 : x
  2. Step 2: Convert to fraction form
    338.50/466.74 = 221.86/x
  3. Step 3: Cross multiply
    338.50x = 466.74 × 221.86
  4. Step 4: Simplify right side
    338.50x = 103,550.94
  5. Step 5: Solve for x
    x = 103,550.94/338.50
  6. Step 6: Final answer
    x = 305.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.