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Finding the Third Proportional to 1.51 and 3.87

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Solution

The third proportional to 1.51 and 3.87 is: 9.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.51 : 3.87 = 3.87 : x
  2. Step 2: Convert to fraction form
    1.51/3.87 = 3.87/x
  3. Step 3: Cross multiply
    1.51x = 3.87 × 3.87
  4. Step 4: Simplify right side
    1.51x = 14.94
  5. Step 5: Solve for x
    x = 14.94/1.51
  6. Step 6: Final answer
    x = 9.91

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Why These Related Problems?

These problems maintain the same ratio (2.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.