Home / 2,311.28-3,189.40-1,263.12

Finding the Fourth Proportional to 2,311.28, 3,189.40 and 1,263.12

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Solution

The fourth proportional to 2,311.28, 3,189.40 and 1,263.12 is: 1,743.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.28 : 3,189.40 = 1,263.12 : x
  2. Step 2: Convert to fraction form
    2,311.28/3,189.40 = 1,263.12/x
  3. Step 3: Cross multiply
    2,311.28x = 3,189.40 × 1,263.12
  4. Step 4: Simplify right side
    2,311.28x = 4,028,594.93
  5. Step 5: Solve for x
    x = 4,028,594.93/2,311.28
  6. Step 6: Final answer
    x = 1,743.01

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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.