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Finding the Fourth Proportional to 25.68, 38.21 and 25.45

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Solution

The fourth proportional to 25.68, 38.21 and 25.45 is: 37.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.68 : 38.21 = 25.45 : x
  2. Step 2: Convert to fraction form
    25.68/38.21 = 25.45/x
  3. Step 3: Cross multiply
    25.68x = 38.21 × 25.45
  4. Step 4: Simplify right side
    25.68x = 972.44
  5. Step 5: Solve for x
    x = 972.44/25.68
  6. Step 6: Final answer
    x = 37.87

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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.