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Finding the Fourth Proportional to 1.99, 2.75 and 1.63

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Solution

The fourth proportional to 1.99, 2.75 and 1.63 is: 2.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.99 : 2.75 = 1.63 : x
  2. Step 2: Convert to fraction form
    1.99/2.75 = 1.63/x
  3. Step 3: Cross multiply
    1.99x = 2.75 × 1.63
  4. Step 4: Simplify right side
    1.99x = 4.48
  5. Step 5: Solve for x
    x = 4.48/1.99
  6. Step 6: Final answer
    x = 2.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.