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Finding the Fourth Proportional to 48.95, 67.56 and 28.23

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Solution

The fourth proportional to 48.95, 67.56 and 28.23 is: 38.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    48.95 : 67.56 = 28.23 : x
  2. Step 2: Convert to fraction form
    48.95/67.56 = 28.23/x
  3. Step 3: Cross multiply
    48.95x = 67.56 × 28.23
  4. Step 4: Simplify right side
    48.95x = 1,907.29
  5. Step 5: Solve for x
    x = 1,907.29/48.95
  6. Step 6: Final answer
    x = 38.96

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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.