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Finding the Fourth Proportional to 39.44, 58.91 and 38.18

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Solution

The fourth proportional to 39.44, 58.91 and 38.18 is: 57.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.44 : 58.91 = 38.18 : x
  2. Step 2: Convert to fraction form
    39.44/58.91 = 38.18/x
  3. Step 3: Cross multiply
    39.44x = 58.91 × 38.18
  4. Step 4: Simplify right side
    39.44x = 2,249.18
  5. Step 5: Solve for x
    x = 2,249.18/39.44
  6. Step 6: Final answer
    x = 57.03

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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.