Home / 2,821.13-4,227.12-1,722.15

Finding the Fourth Proportional to 2,821.13, 4,227.12 and 1,722.15

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Solution

The fourth proportional to 2,821.13, 4,227.12 and 1,722.15 is: 2,580.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.13 : 4,227.12 = 1,722.15 : x
  2. Step 2: Convert to fraction form
    2,821.13/4,227.12 = 1,722.15/x
  3. Step 3: Cross multiply
    2,821.13x = 4,227.12 × 1,722.15
  4. Step 4: Simplify right side
    2,821.13x = 7,279,734.71
  5. Step 5: Solve for x
    x = 7,279,734.71/2,821.13
  6. Step 6: Final answer
    x = 2,580.44

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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.