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Finding the Fourth Proportional to 1.37, 2.05 and 1.25

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Solution

The fourth proportional to 1.37, 2.05 and 1.25 is: 1.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.37 : 2.05 = 1.25 : x
  2. Step 2: Convert to fraction form
    1.37/2.05 = 1.25/x
  3. Step 3: Cross multiply
    1.37x = 2.05 × 1.25
  4. Step 4: Simplify right side
    1.37x = 2.56
  5. Step 5: Solve for x
    x = 2.56/1.37
  6. Step 6: Final answer
    x = 1.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.