Home / 2,311.60-3,188.76-1,379.44

Finding the Fourth Proportional to 2,311.60, 3,188.76 and 1,379.44

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Solution

The fourth proportional to 2,311.60, 3,188.76 and 1,379.44 is: 1,902.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.60 : 3,188.76 = 1,379.44 : x
  2. Step 2: Convert to fraction form
    2,311.60/3,188.76 = 1,379.44/x
  3. Step 3: Cross multiply
    2,311.60x = 3,188.76 × 1,379.44
  4. Step 4: Simplify right side
    2,311.60x = 4,398,703.09
  5. Step 5: Solve for x
    x = 4,398,703.09/2,311.60
  6. Step 6: Final answer
    x = 1,902.88

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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.