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Finding the Fourth Proportional to 338.69, 466.62 and 251.21

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Solution

The fourth proportional to 338.69, 466.62 and 251.21 is: 346.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.69 : 466.62 = 251.21 : x
  2. Step 2: Convert to fraction form
    338.69/466.62 = 251.21/x
  3. Step 3: Cross multiply
    338.69x = 466.62 × 251.21
  4. Step 4: Simplify right side
    338.69x = 117,219.61
  5. Step 5: Solve for x
    x = 117,219.61/338.69
  6. Step 6: Final answer
    x = 346.10

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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.