Home / 2,116.20-3,174.30-817.14

Finding the Fourth Proportional to 2,116.20, 3,174.30 and 817.14

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Solution

The fourth proportional to 2,116.20, 3,174.30 and 817.14 is: 1,225.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.20 : 3,174.30 = 817.14 : x
  2. Step 2: Convert to fraction form
    2,116.20/3,174.30 = 817.14/x
  3. Step 3: Cross multiply
    2,116.20x = 3,174.30 × 817.14
  4. Step 4: Simplify right side
    2,116.20x = 2,593,847.50
  5. Step 5: Solve for x
    x = 2,593,847.50/2,116.20
  6. Step 6: Final answer
    x = 1,225.71

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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.