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Finding the Fourth Proportional to 0.92, 1.28 and 0.82

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Solution

The fourth proportional to 0.92, 1.28 and 0.82 is: 1.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    0.92 : 1.28 = 0.82 : x
  2. Step 2: Convert to fraction form
    0.92/1.28 = 0.82/x
  3. Step 3: Cross multiply
    0.92x = 1.28 × 0.82
  4. Step 4: Simplify right side
    0.92x = 1.05
  5. Step 5: Solve for x
    x = 1.05/0.92
  6. Step 6: Final answer
    x = 1.14

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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.