Home / 2,231.61-3,079.26-1,392.18

Finding the Fourth Proportional to 2,231.61, 3,079.26 and 1,392.18

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Solution

The fourth proportional to 2,231.61, 3,079.26 and 1,392.18 is: 1,920.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.61 : 3,079.26 = 1,392.18 : x
  2. Step 2: Convert to fraction form
    2,231.61/3,079.26 = 1,392.18/x
  3. Step 3: Cross multiply
    2,231.61x = 3,079.26 × 1,392.18
  4. Step 4: Simplify right side
    2,231.61x = 4,286,884.19
  5. Step 5: Solve for x
    x = 4,286,884.19/2,231.61
  6. Step 6: Final answer
    x = 1,920.98

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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.