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Finding the Fourth Proportional to 248.21, 372.08 and 103.85

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Solution

The fourth proportional to 248.21, 372.08 and 103.85 is: 155.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.21 : 372.08 = 103.85 : x
  2. Step 2: Convert to fraction form
    248.21/372.08 = 103.85/x
  3. Step 3: Cross multiply
    248.21x = 372.08 × 103.85
  4. Step 4: Simplify right side
    248.21x = 38,639.99
  5. Step 5: Solve for x
    x = 38,639.99/248.21
  6. Step 6: Final answer
    x = 155.67

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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.