Home / 2,311.64-3,190.12-1,263.78

Finding the Fourth Proportional to 2,311.64, 3,190.12 and 1,263.78

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Solution

The fourth proportional to 2,311.64, 3,190.12 and 1,263.78 is: 1,744.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.64 : 3,190.12 = 1,263.78 : x
  2. Step 2: Convert to fraction form
    2,311.64/3,190.12 = 1,263.78/x
  3. Step 3: Cross multiply
    2,311.64x = 3,190.12 × 1,263.78
  4. Step 4: Simplify right side
    2,311.64x = 4,031,609.85
  5. Step 5: Solve for x
    x = 4,031,609.85/2,311.64
  6. Step 6: Final answer
    x = 1,744.05

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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.