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Finding the Fourth Proportional to 276.11, 383.70 and 272.67

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Solution

The fourth proportional to 276.11, 383.70 and 272.67 is: 378.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.11 : 383.70 = 272.67 : x
  2. Step 2: Convert to fraction form
    276.11/383.70 = 272.67/x
  3. Step 3: Cross multiply
    276.11x = 383.70 × 272.67
  4. Step 4: Simplify right side
    276.11x = 104,622.24
  5. Step 5: Solve for x
    x = 104,622.24/276.11
  6. Step 6: Final answer
    x = 378.92

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.