Home / 2,989.02-4,122.03-2,279.61

Finding the Fourth Proportional to 2,989.02, 4,122.03 and 2,279.61

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Solution

The fourth proportional to 2,989.02, 4,122.03 and 2,279.61 is: 3,143.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.02 : 4,122.03 = 2,279.61 : x
  2. Step 2: Convert to fraction form
    2,989.02/4,122.03 = 2,279.61/x
  3. Step 3: Cross multiply
    2,989.02x = 4,122.03 × 2,279.61
  4. Step 4: Simplify right side
    2,989.02x = 9,396,620.81
  5. Step 5: Solve for x
    x = 9,396,620.81/2,989.02
  6. Step 6: Final answer
    x = 3,143.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.