Home / 2,811.78-4,216.55-1,167.21

Finding the Fourth Proportional to 2,811.78, 4,216.55 and 1,167.21

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Solution

The fourth proportional to 2,811.78, 4,216.55 and 1,167.21 is: 1,750.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.78 : 4,216.55 = 1,167.21 : x
  2. Step 2: Convert to fraction form
    2,811.78/4,216.55 = 1,167.21/x
  3. Step 3: Cross multiply
    2,811.78x = 4,216.55 × 1,167.21
  4. Step 4: Simplify right side
    2,811.78x = 4,921,593.49
  5. Step 5: Solve for x
    x = 4,921,593.49/2,811.78
  6. Step 6: Final answer
    x = 1,750.35

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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.