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Finding the Fourth Proportional to 185.31, 277.74 and 98.55

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Solution

The fourth proportional to 185.31, 277.74 and 98.55 is: 147.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    185.31 : 277.74 = 98.55 : x
  2. Step 2: Convert to fraction form
    185.31/277.74 = 98.55/x
  3. Step 3: Cross multiply
    185.31x = 277.74 × 98.55
  4. Step 4: Simplify right side
    185.31x = 27,371.28
  5. Step 5: Solve for x
    x = 27,371.28/185.31
  6. Step 6: Final answer
    x = 147.71

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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.