Home / 5,078.26-7,617.77-1,380.78

Finding the Fourth Proportional to 5,078.26, 7,617.77 and 1,380.78

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Solution

The fourth proportional to 5,078.26, 7,617.77 and 1,380.78 is: 2,071.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.26 : 7,617.77 = 1,380.78 : x
  2. Step 2: Convert to fraction form
    5,078.26/7,617.77 = 1,380.78/x
  3. Step 3: Cross multiply
    5,078.26x = 7,617.77 × 1,380.78
  4. Step 4: Simplify right side
    5,078.26x = 10,518,462.73
  5. Step 5: Solve for x
    x = 10,518,462.73/5,078.26
  6. Step 6: Final answer
    x = 2,071.27

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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.