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Finding the Fourth Proportional to 54.42, 74.94 and 48.28

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Solution

The fourth proportional to 54.42, 74.94 and 48.28 is: 66.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.42 : 74.94 = 48.28 : x
  2. Step 2: Convert to fraction form
    54.42/74.94 = 48.28/x
  3. Step 3: Cross multiply
    54.42x = 74.94 × 48.28
  4. Step 4: Simplify right side
    54.42x = 3,618.10
  5. Step 5: Solve for x
    x = 3,618.10/54.42
  6. Step 6: Final answer
    x = 66.48

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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.