Home / 2,311.80-3,190.29-1,317.15

Finding the Fourth Proportional to 2,311.80, 3,190.29 and 1,317.15

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Solution

The fourth proportional to 2,311.80, 3,190.29 and 1,317.15 is: 1,817.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.80 : 3,190.29 = 1,317.15 : x
  2. Step 2: Convert to fraction form
    2,311.80/3,190.29 = 1,317.15/x
  3. Step 3: Cross multiply
    2,311.80x = 3,190.29 × 1,317.15
  4. Step 4: Simplify right side
    2,311.80x = 4,202,090.47
  5. Step 5: Solve for x
    x = 4,202,090.47/2,311.80
  6. Step 6: Final answer
    x = 1,817.67

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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.