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Finding the Fourth Proportional to 274.47, 378.70 and 185.96

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Solution

The fourth proportional to 274.47, 378.70 and 185.96 is: 256.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.47 : 378.70 = 185.96 : x
  2. Step 2: Convert to fraction form
    274.47/378.70 = 185.96/x
  3. Step 3: Cross multiply
    274.47x = 378.70 × 185.96
  4. Step 4: Simplify right side
    274.47x = 70,424.58
  5. Step 5: Solve for x
    x = 70,424.58/274.47
  6. Step 6: Final answer
    x = 256.59

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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.