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Finding the Fourth Proportional to 2.99, 4.45 and 2.83

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Solution

The fourth proportional to 2.99, 4.45 and 2.83 is: 4.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2.99 : 4.45 = 2.83 : x
  2. Step 2: Convert to fraction form
    2.99/4.45 = 2.83/x
  3. Step 3: Cross multiply
    2.99x = 4.45 × 2.83
  4. Step 4: Simplify right side
    2.99x = 12.59
  5. Step 5: Solve for x
    x = 12.59/2.99
  6. Step 6: Final answer
    x = 4.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.