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Finding the Fourth Proportional to 45.09, 67.31 and 41.48

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Solution

The fourth proportional to 45.09, 67.31 and 41.48 is: 61.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    45.09 : 67.31 = 41.48 : x
  2. Step 2: Convert to fraction form
    45.09/67.31 = 41.48/x
  3. Step 3: Cross multiply
    45.09x = 67.31 × 41.48
  4. Step 4: Simplify right side
    45.09x = 2,791.55
  5. Step 5: Solve for x
    x = 2,791.55/45.09
  6. Step 6: Final answer
    x = 61.91

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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.