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Finding the Fourth Proportional to 34.88, 48.03 and 28.31

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Solution

The fourth proportional to 34.88, 48.03 and 28.31 is: 38.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.88 : 48.03 = 28.31 : x
  2. Step 2: Convert to fraction form
    34.88/48.03 = 28.31/x
  3. Step 3: Cross multiply
    34.88x = 48.03 × 28.31
  4. Step 4: Simplify right side
    34.88x = 1,359.49
  5. Step 5: Solve for x
    x = 1,359.49/34.88
  6. Step 6: Final answer
    x = 38.98

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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.