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Finding the Fourth Proportional to 338.77, 467.46 and 189.39

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Solution

The fourth proportional to 338.77, 467.46 and 189.39 is: 261.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.77 : 467.46 = 189.39 : x
  2. Step 2: Convert to fraction form
    338.77/467.46 = 189.39/x
  3. Step 3: Cross multiply
    338.77x = 467.46 × 189.39
  4. Step 4: Simplify right side
    338.77x = 88,529.79
  5. Step 5: Solve for x
    x = 88,529.79/338.77
  6. Step 6: Final answer
    x = 261.33

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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.