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Finding the Fourth Proportional to 338.40, 464.94 and 272.70

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Solution

The fourth proportional to 338.40, 464.94 and 272.70 is: 374.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.40 : 464.94 = 272.70 : x
  2. Step 2: Convert to fraction form
    338.40/464.94 = 272.70/x
  3. Step 3: Cross multiply
    338.40x = 464.94 × 272.70
  4. Step 4: Simplify right side
    338.40x = 126,789.14
  5. Step 5: Solve for x
    x = 126,789.14/338.40
  6. Step 6: Final answer
    x = 374.67

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.