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Finding the Fourth Proportional to 27.96, 41.60 and 27.80

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Solution

The fourth proportional to 27.96, 41.60 and 27.80 is: 41.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.96 : 41.60 = 27.80 : x
  2. Step 2: Convert to fraction form
    27.96/41.60 = 27.80/x
  3. Step 3: Cross multiply
    27.96x = 41.60 × 27.80
  4. Step 4: Simplify right side
    27.96x = 1,156.48
  5. Step 5: Solve for x
    x = 1,156.48/27.96
  6. Step 6: Final answer
    x = 41.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.