Home / 2,688.26-4,033.55-1,390.64

Finding the Fourth Proportional to 2,688.26, 4,033.55 and 1,390.64

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Solution

The fourth proportional to 2,688.26, 4,033.55 and 1,390.64 is: 2,086.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.26 : 4,033.55 = 1,390.64 : x
  2. Step 2: Convert to fraction form
    2,688.26/4,033.55 = 1,390.64/x
  3. Step 3: Cross multiply
    2,688.26x = 4,033.55 × 1,390.64
  4. Step 4: Simplify right side
    2,688.26x = 5,609,215.97
  5. Step 5: Solve for x
    x = 5,609,215.97/2,688.26
  6. Step 6: Final answer
    x = 2,086.56

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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.