Home / 2,311.78-3,190.50-1,317.24

Finding the Fourth Proportional to 2,311.78, 3,190.50 and 1,317.24

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Solution

The fourth proportional to 2,311.78, 3,190.50 and 1,317.24 is: 1,817.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.78 : 3,190.50 = 1,317.24 : x
  2. Step 2: Convert to fraction form
    2,311.78/3,190.50 = 1,317.24/x
  3. Step 3: Cross multiply
    2,311.78x = 3,190.50 × 1,317.24
  4. Step 4: Simplify right side
    2,311.78x = 4,202,654.22
  5. Step 5: Solve for x
    x = 4,202,654.22/2,311.78
  6. Step 6: Final answer
    x = 1,817.93

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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.