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Finding the Fourth Proportional to 274.62, 378.83 and 187.14

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Solution

The fourth proportional to 274.62, 378.83 and 187.14 is: 258.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.62 : 378.83 = 187.14 : x
  2. Step 2: Convert to fraction form
    274.62/378.83 = 187.14/x
  3. Step 3: Cross multiply
    274.62x = 378.83 × 187.14
  4. Step 4: Simplify right side
    274.62x = 70,893.31
  5. Step 5: Solve for x
    x = 70,893.31/274.62
  6. Step 6: Final answer
    x = 258.15

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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.