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Finding the Fourth Proportional to 48.98, 67.61 and 28.27

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Solution

The fourth proportional to 48.98, 67.61 and 28.27 is: 39.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.98 : 67.61 = 28.27 : x
  2. Step 2: Convert to fraction form
    48.98/67.61 = 28.27/x
  3. Step 3: Cross multiply
    48.98x = 67.61 × 28.27
  4. Step 4: Simplify right side
    48.98x = 1,911.38
  5. Step 5: Solve for x
    x = 1,911.38/48.98
  6. Step 6: Final answer
    x = 39.02

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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.