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Finding the Third Proportional to 1.50 and 2.15

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Solution

The third proportional to 1.50 and 2.15 is: 3.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.50 : 2.15 = 2.15 : x
  2. Step 2: Convert to fraction form
    1.50/2.15 = 2.15/x
  3. Step 3: Cross multiply
    1.50x = 2.15 × 2.15
  4. Step 4: Simplify right side
    1.50x = 4.63
  5. Step 5: Solve for x
    x = 4.63/1.50
  6. Step 6: Final answer
    x = 3.09

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.