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Finding the Fourth Proportional to 1.97, 2.97 and 1.87

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Solution

The fourth proportional to 1.97, 2.97 and 1.87 is: 2.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1.97 : 2.97 = 1.87 : x
  2. Step 2: Convert to fraction form
    1.97/2.97 = 1.87/x
  3. Step 3: Cross multiply
    1.97x = 2.97 × 1.87
  4. Step 4: Simplify right side
    1.97x = 5.55
  5. Step 5: Solve for x
    x = 5.55/1.97
  6. Step 6: Final answer
    x = 2.82

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.