Home / 2,311.30-3,189.84-1,367.40

Finding the Fourth Proportional to 2,311.30, 3,189.84 and 1,367.40

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Solution

The fourth proportional to 2,311.30, 3,189.84 and 1,367.40 is: 1,887.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.30 : 3,189.84 = 1,367.40 : x
  2. Step 2: Convert to fraction form
    2,311.30/3,189.84 = 1,367.40/x
  3. Step 3: Cross multiply
    2,311.30x = 3,189.84 × 1,367.40
  4. Step 4: Simplify right side
    2,311.30x = 4,361,787.22
  5. Step 5: Solve for x
    x = 4,361,787.22/2,311.30
  6. Step 6: Final answer
    x = 1,887.16

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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.