Home / 2,311.30-3,189.80-1,316.37

Finding the Fourth Proportional to 2,311.30, 3,189.80 and 1,316.37

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Solution

The fourth proportional to 2,311.30, 3,189.80 and 1,316.37 is: 1,816.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.30 : 3,189.80 = 1,316.37 : x
  2. Step 2: Convert to fraction form
    2,311.30/3,189.80 = 1,316.37/x
  3. Step 3: Cross multiply
    2,311.30x = 3,189.80 × 1,316.37
  4. Step 4: Simplify right side
    2,311.30x = 4,198,957.03
  5. Step 5: Solve for x
    x = 4,198,957.03/2,311.30
  6. Step 6: Final answer
    x = 1,816.71

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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.