Home / 3,990.57-5,505.56-2,311.06

Finding the Fourth Proportional to 3,990.57, 5,505.56 and 2,311.06

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Solution

The fourth proportional to 3,990.57, 5,505.56 and 2,311.06 is: 3,188.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.57 : 5,505.56 = 2,311.06 : x
  2. Step 2: Convert to fraction form
    3,990.57/5,505.56 = 2,311.06/x
  3. Step 3: Cross multiply
    3,990.57x = 5,505.56 × 2,311.06
  4. Step 4: Simplify right side
    3,990.57x = 12,723,679.49
  5. Step 5: Solve for x
    x = 12,723,679.49/3,990.57
  6. Step 6: Final answer
    x = 3,188.44

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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.