Home / 2,811.29-4,218.89-1,821.65

Finding the Fourth Proportional to 2,811.29, 4,218.89 and 1,821.65

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Solution

The fourth proportional to 2,811.29, 4,218.89 and 1,821.65 is: 2,733.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.29 : 4,218.89 = 1,821.65 : x
  2. Step 2: Convert to fraction form
    2,811.29/4,218.89 = 1,821.65/x
  3. Step 3: Cross multiply
    2,811.29x = 4,218.89 × 1,821.65
  4. Step 4: Simplify right side
    2,811.29x = 7,685,310.77
  5. Step 5: Solve for x
    x = 7,685,310.77/2,811.29
  6. Step 6: Final answer
    x = 2,733.74

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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.