Home / 2,821.71-4,211.88-2,619.02

Finding the Fourth Proportional to 2,821.71, 4,211.88 and 2,619.02

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Solution

The fourth proportional to 2,821.71, 4,211.88 and 2,619.02 is: 3,909.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.71 : 4,211.88 = 2,619.02 : x
  2. Step 2: Convert to fraction form
    2,821.71/4,211.88 = 2,619.02/x
  3. Step 3: Cross multiply
    2,821.71x = 4,211.88 × 2,619.02
  4. Step 4: Simplify right side
    2,821.71x = 11,030,976.90
  5. Step 5: Solve for x
    x = 11,030,976.90/2,821.71
  6. Step 6: Final answer
    x = 3,909.32

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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.