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Finding the Fourth Proportional to 54.21, 74.88 and 44.49

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Solution

The fourth proportional to 54.21, 74.88 and 44.49 is: 61.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    54.21 : 74.88 = 44.49 : x
  2. Step 2: Convert to fraction form
    54.21/74.88 = 44.49/x
  3. Step 3: Cross multiply
    54.21x = 74.88 × 44.49
  4. Step 4: Simplify right side
    54.21x = 3,331.41
  5. Step 5: Solve for x
    x = 3,331.41/54.21
  6. Step 6: Final answer
    x = 61.45

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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.