Home / 2,813.78-4,218.39-1,171.55

Finding the Fourth Proportional to 2,813.78, 4,218.39 and 1,171.55

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Solution

The fourth proportional to 2,813.78, 4,218.39 and 1,171.55 is: 1,756.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.78 : 4,218.39 = 1,171.55 : x
  2. Step 2: Convert to fraction form
    2,813.78/4,218.39 = 1,171.55/x
  3. Step 3: Cross multiply
    2,813.78x = 4,218.39 × 1,171.55
  4. Step 4: Simplify right side
    2,813.78x = 4,942,065.35
  5. Step 5: Solve for x
    x = 4,942,065.35/2,813.78
  6. Step 6: Final answer
    x = 1,756.38

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1.5x scale

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.