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Finding the Fourth Proportional to 6.41, 9.61 and 1.90

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Solution

The fourth proportional to 6.41, 9.61 and 1.90 is: 2.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6.41 : 9.61 = 1.90 : x
  2. Step 2: Convert to fraction form
    6.41/9.61 = 1.90/x
  3. Step 3: Cross multiply
    6.41x = 9.61 × 1.90
  4. Step 4: Simplify right side
    6.41x = 18.25
  5. Step 5: Solve for x
    x = 18.25/6.41
  6. Step 6: Final answer
    x = 2.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.