Home / 2,082.21-3,122.55-620.87

Finding the Fourth Proportional to 2,082.21, 3,122.55 and 620.87

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Solution

The fourth proportional to 2,082.21, 3,122.55 and 620.87 is: 931.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,082.21 : 3,122.55 = 620.87 : x
  2. Step 2: Convert to fraction form
    2,082.21/3,122.55 = 620.87/x
  3. Step 3: Cross multiply
    2,082.21x = 3,122.55 × 620.87
  4. Step 4: Simplify right side
    2,082.21x = 1,938,682.01
  5. Step 5: Solve for x
    x = 1,938,682.01/2,082.21
  6. Step 6: Final answer
    x = 931.07

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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.