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Finding the Fourth Proportional to 2.77, 4.15 and 0.98

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Solution

The fourth proportional to 2.77, 4.15 and 0.98 is: 1.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.77 : 4.15 = 0.98 : x
  2. Step 2: Convert to fraction form
    2.77/4.15 = 0.98/x
  3. Step 3: Cross multiply
    2.77x = 4.15 × 0.98
  4. Step 4: Simplify right side
    2.77x = 4.08
  5. Step 5: Solve for x
    x = 4.08/2.77
  6. Step 6: Final answer
    x = 1.48

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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.