Home / 3,854.75-5,778.65-1,387.84

Finding the Fourth Proportional to 3,854.75, 5,778.65 and 1,387.84

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Solution

The fourth proportional to 3,854.75, 5,778.65 and 1,387.84 is: 2,080.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,854.75 : 5,778.65 = 1,387.84 : x
  2. Step 2: Convert to fraction form
    3,854.75/5,778.65 = 1,387.84/x
  3. Step 3: Cross multiply
    3,854.75x = 5,778.65 × 1,387.84
  4. Step 4: Simplify right side
    3,854.75x = 8,019,841.62
  5. Step 5: Solve for x
    x = 8,019,841.62/3,854.75
  6. Step 6: Final answer
    x = 2,080.51

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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.