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Finding the Fourth Proportional to 2.76, 4.16 and 1.88

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Solution

The fourth proportional to 2.76, 4.16 and 1.88 is: 2.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.76 : 4.16 = 1.88 : x
  2. Step 2: Convert to fraction form
    2.76/4.16 = 1.88/x
  3. Step 3: Cross multiply
    2.76x = 4.16 × 1.88
  4. Step 4: Simplify right side
    2.76x = 7.79
  5. Step 5: Solve for x
    x = 7.79/2.76
  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.