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Finding the Fourth Proportional to 4,879.28, 6,732.96 and 2,990

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Solution

The fourth proportional to 4,879.28, 6,732.96 and 2,990 is: 4,125.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,879.28 : 6,732.96 = 2,990 : x
  2. Step 2: Convert to fraction form
    4,879.28/6,732.96 = 2,990/x
  3. Step 3: Cross multiply
    4,879.28x = 6,732.96 × 2,990
  4. Step 4: Simplify right side
    4,879.28x = 20,131,550.40
  5. Step 5: Solve for x
    x = 20,131,550.40/4,879.28
  6. Step 6: Final answer
    x = 4,125.93

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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.