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Finding the Fourth Proportional to 54.26, 74.85 and 46.91

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Solution

The fourth proportional to 54.26, 74.85 and 46.91 is: 64.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.26 : 74.85 = 46.91 : x
  2. Step 2: Convert to fraction form
    54.26/74.85 = 46.91/x
  3. Step 3: Cross multiply
    54.26x = 74.85 × 46.91
  4. Step 4: Simplify right side
    54.26x = 3,511.22
  5. Step 5: Solve for x
    x = 3,511.22/54.26
  6. Step 6: Final answer
    x = 64.71

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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.