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Finding the Third Proportional to 0.71 and 1.40

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Solution

The third proportional to 0.71 and 1.40 is: 2.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    0.71 : 1.40 = 1.40 : x
  2. Step 2: Convert to fraction form
    0.71/1.40 = 1.40/x
  3. Step 3: Cross multiply
    0.71x = 1.40 × 1.40
  4. Step 4: Simplify right side
    0.71x = 1.96
  5. Step 5: Solve for x
    x = 1.96/0.71
  6. Step 6: Final answer
    x = 2.76

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Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.