Home / 2,128.44-3,188.50-1,395.79

Finding the Fourth Proportional to 2,128.44, 3,188.50 and 1,395.79

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Solution

The fourth proportional to 2,128.44, 3,188.50 and 1,395.79 is: 2,090.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.44 : 3,188.50 = 1,395.79 : x
  2. Step 2: Convert to fraction form
    2,128.44/3,188.50 = 1,395.79/x
  3. Step 3: Cross multiply
    2,128.44x = 3,188.50 × 1,395.79
  4. Step 4: Simplify right side
    2,128.44x = 4,450,476.42
  5. Step 5: Solve for x
    x = 4,450,476.42/2,128.44
  6. Step 6: Final answer
    x = 2,090.96

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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.