Home / 2,120.14-3,180.20-581.14

Finding the Fourth Proportional to 2,120.14, 3,180.20 and 581.14

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Solution

The fourth proportional to 2,120.14, 3,180.20 and 581.14 is: 871.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.14 : 3,180.20 = 581.14 : x
  2. Step 2: Convert to fraction form
    2,120.14/3,180.20 = 581.14/x
  3. Step 3: Cross multiply
    2,120.14x = 3,180.20 × 581.14
  4. Step 4: Simplify right side
    2,120.14x = 1,848,141.43
  5. Step 5: Solve for x
    x = 1,848,141.43/2,120.14
  6. Step 6: Final answer
    x = 871.71

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Double scale
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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.