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Finding the Fourth Proportional to 274.52, 378.60 and 187.31

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Solution

The fourth proportional to 274.52, 378.60 and 187.31 is: 258.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.52 : 378.60 = 187.31 : x
  2. Step 2: Convert to fraction form
    274.52/378.60 = 187.31/x
  3. Step 3: Cross multiply
    274.52x = 378.60 × 187.31
  4. Step 4: Simplify right side
    274.52x = 70,915.57
  5. Step 5: Solve for x
    x = 70,915.57/274.52
  6. Step 6: Final answer
    x = 258.33

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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.