Home / 2,687.18-4,030.91-838.55

Finding the Fourth Proportional to 2,687.18, 4,030.91 and 838.55

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Solution

The fourth proportional to 2,687.18, 4,030.91 and 838.55 is: 1,257.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.18 : 4,030.91 = 838.55 : x
  2. Step 2: Convert to fraction form
    2,687.18/4,030.91 = 838.55/x
  3. Step 3: Cross multiply
    2,687.18x = 4,030.91 × 838.55
  4. Step 4: Simplify right side
    2,687.18x = 3,380,133.33
  5. Step 5: Solve for x
    x = 3,380,133.33/2,687.18
  6. Step 6: Final answer
    x = 1,257.88

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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.