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Finding the Fourth Proportional to 248.30, 372.48 and 83.76

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Solution

The fourth proportional to 248.30, 372.48 and 83.76 is: 125.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    248.30 : 372.48 = 83.76 : x
  2. Step 2: Convert to fraction form
    248.30/372.48 = 83.76/x
  3. Step 3: Cross multiply
    248.30x = 372.48 × 83.76
  4. Step 4: Simplify right side
    248.30x = 31,198.92
  5. Step 5: Solve for x
    x = 31,198.92/248.30
  6. Step 6: Final answer
    x = 125.65

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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.