Home / 2,311.29-3,191.25-2,165.49

Finding the Fourth Proportional to 2,311.29, 3,191.25 and 2,165.49

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Solution

The fourth proportional to 2,311.29, 3,191.25 and 2,165.49 is: 2,989.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.29 : 3,191.25 = 2,165.49 : x
  2. Step 2: Convert to fraction form
    2,311.29/3,191.25 = 2,165.49/x
  3. Step 3: Cross multiply
    2,311.29x = 3,191.25 × 2,165.49
  4. Step 4: Simplify right side
    2,311.29x = 6,910,619.96
  5. Step 5: Solve for x
    x = 6,910,619.96/2,311.29
  6. Step 6: Final answer
    x = 2,989.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.