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Finding the Fourth Proportional to 245.21, 367.86 and 82.88

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Solution

The fourth proportional to 245.21, 367.86 and 82.88 is: 124.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.21 : 367.86 = 82.88 : x
  2. Step 2: Convert to fraction form
    245.21/367.86 = 82.88/x
  3. Step 3: Cross multiply
    245.21x = 367.86 × 82.88
  4. Step 4: Simplify right side
    245.21x = 30,489.62
  5. Step 5: Solve for x
    x = 30,489.62/245.21
  6. Step 6: Final answer
    x = 124.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.