Home / 2,081.76-3,121.80-1,432.68

Finding the Fourth Proportional to 2,081.76, 3,121.80 and 1,432.68

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Solution

The fourth proportional to 2,081.76, 3,121.80 and 1,432.68 is: 2,148.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,081.76 : 3,121.80 = 1,432.68 : x
  2. Step 2: Convert to fraction form
    2,081.76/3,121.80 = 1,432.68/x
  3. Step 3: Cross multiply
    2,081.76x = 3,121.80 × 1,432.68
  4. Step 4: Simplify right side
    2,081.76x = 4,472,540.42
  5. Step 5: Solve for x
    x = 4,472,540.42/2,081.76
  6. Step 6: Final answer
    x = 2,148.44

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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.