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Finding the Third Proportional to 1.90 and 2.45

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Solution

The third proportional to 1.90 and 2.45 is: 3.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.90 : 2.45 = 2.45 : x
  2. Step 2: Convert to fraction form
    1.90/2.45 = 2.45/x
  3. Step 3: Cross multiply
    1.90x = 2.45 × 2.45
  4. Step 4: Simplify right side
    1.90x = 5.98
  5. Step 5: Solve for x
    x = 5.98/1.90
  6. Step 6: Final answer
    x = 3.15

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Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.