Home / 2,108.13-3,162.21-874.20

Finding the Fourth Proportional to 2,108.13, 3,162.21 and 874.20

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Solution

The fourth proportional to 2,108.13, 3,162.21 and 874.20 is: 1,311.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.13 : 3,162.21 = 874.20 : x
  2. Step 2: Convert to fraction form
    2,108.13/3,162.21 = 874.20/x
  3. Step 3: Cross multiply
    2,108.13x = 3,162.21 × 874.20
  4. Step 4: Simplify right side
    2,108.13x = 2,764,403.98
  5. Step 5: Solve for x
    x = 2,764,403.98/2,108.13
  6. Step 6: Final answer
    x = 1,311.31

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.