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Finding the Third Proportional to 0.91 and 2.51

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Solution

The third proportional to 0.91 and 2.51 is: 6.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    0.91 : 2.51 = 2.51 : x
  2. Step 2: Convert to fraction form
    0.91/2.51 = 2.51/x
  3. Step 3: Cross multiply
    0.91x = 2.51 × 2.51
  4. Step 4: Simplify right side
    0.91x = 6.31
  5. Step 5: Solve for x
    x = 6.31/0.91
  6. Step 6: Final answer
    x = 6.91

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Why These Related Problems?

These problems maintain the same ratio (2.75) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.