Home / 2,820.86-4,231.32-1,089.92

Finding the Fourth Proportional to 2,820.86, 4,231.32 and 1,089.92

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Solution

The fourth proportional to 2,820.86, 4,231.32 and 1,089.92 is: 1,634.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.86 : 4,231.32 = 1,089.92 : x
  2. Step 2: Convert to fraction form
    2,820.86/4,231.32 = 1,089.92/x
  3. Step 3: Cross multiply
    2,820.86x = 4,231.32 × 1,089.92
  4. Step 4: Simplify right side
    2,820.86x = 4,611,800.29
  5. Step 5: Solve for x
    x = 4,611,800.29/2,820.86
  6. Step 6: Final answer
    x = 1,634.89

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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.