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Finding the Fourth Proportional to 274.97, 379.46 and 187.67

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Solution

The fourth proportional to 274.97, 379.46 and 187.67 is: 258.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.97 : 379.46 = 187.67 : x
  2. Step 2: Convert to fraction form
    274.97/379.46 = 187.67/x
  3. Step 3: Cross multiply
    274.97x = 379.46 × 187.67
  4. Step 4: Simplify right side
    274.97x = 71,212.31
  5. Step 5: Solve for x
    x = 71,212.31/274.97
  6. Step 6: Final answer
    x = 258.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.