Home / 2,821.32-4,231.50-1,089.96

Finding the Fourth Proportional to 2,821.32, 4,231.50 and 1,089.96

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Solution

The fourth proportional to 2,821.32, 4,231.50 and 1,089.96 is: 1,634.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.32 : 4,231.50 = 1,089.96 : x
  2. Step 2: Convert to fraction form
    2,821.32/4,231.50 = 1,089.96/x
  3. Step 3: Cross multiply
    2,821.32x = 4,231.50 × 1,089.96
  4. Step 4: Simplify right side
    2,821.32x = 4,612,165.74
  5. Step 5: Solve for x
    x = 4,612,165.74/2,821.32
  6. Step 6: Final answer
    x = 1,634.75

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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.