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Finding the Fourth Proportional to 34.90, 48.16 and 26.72

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Solution

The fourth proportional to 34.90, 48.16 and 26.72 is: 36.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.90 : 48.16 = 26.72 : x
  2. Step 2: Convert to fraction form
    34.90/48.16 = 26.72/x
  3. Step 3: Cross multiply
    34.90x = 48.16 × 26.72
  4. Step 4: Simplify right side
    34.90x = 1,286.84
  5. Step 5: Solve for x
    x = 1,286.84/34.90
  6. Step 6: Final answer
    x = 36.87

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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.