Home / 2,720.40-4,078.67-1,403.59

Finding the Fourth Proportional to 2,720.40, 4,078.67 and 1,403.59

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Solution

The fourth proportional to 2,720.40, 4,078.67 and 1,403.59 is: 2,104.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.40 : 4,078.67 = 1,403.59 : x
  2. Step 2: Convert to fraction form
    2,720.40/4,078.67 = 1,403.59/x
  3. Step 3: Cross multiply
    2,720.40x = 4,078.67 × 1,403.59
  4. Step 4: Simplify right side
    2,720.40x = 5,724,778.75
  5. Step 5: Solve for x
    x = 5,724,778.75/2,720.40
  6. Step 6: Final answer
    x = 2,104.39

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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.