Home / 2,311.08-3,189.30-1,316.40

Finding the Fourth Proportional to 2,311.08, 3,189.30 and 1,316.40

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Solution

The fourth proportional to 2,311.08, 3,189.30 and 1,316.40 is: 1,816.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,311.08 : 3,189.30 = 1,316.40 : x
  2. Step 2: Convert to fraction form
    2,311.08/3,189.30 = 1,316.40/x
  3. Step 3: Cross multiply
    2,311.08x = 3,189.30 × 1,316.40
  4. Step 4: Simplify right side
    2,311.08x = 4,198,399.27
  5. Step 5: Solve for x
    x = 4,198,399.27/2,311.08
  6. Step 6: Final answer
    x = 1,816.64

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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.