Home / 1,311.21-1,801.37-1,173.15

Finding the Fourth Proportional to 1,311.21, 1,801.37 and 1,173.15

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Solution

The fourth proportional to 1,311.21, 1,801.37 and 1,173.15 is: 1,611.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.21 : 1,801.37 = 1,173.15 : x
  2. Step 2: Convert to fraction form
    1,311.21/1,801.37 = 1,173.15/x
  3. Step 3: Cross multiply
    1,311.21x = 1,801.37 × 1,173.15
  4. Step 4: Simplify right side
    1,311.21x = 2,113,286.90
  5. Step 5: Solve for x
    x = 2,113,286.90/1,311.21
  6. Step 6: Final answer
    x = 1,611.71

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.