Home / 2,082.13-3,123.20-621.30

Finding the Fourth Proportional to 2,082.13, 3,123.20 and 621.30

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Solution

The fourth proportional to 2,082.13, 3,123.20 and 621.30 is: 931.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,082.13 : 3,123.20 = 621.30 : x
  2. Step 2: Convert to fraction form
    2,082.13/3,123.20 = 621.30/x
  3. Step 3: Cross multiply
    2,082.13x = 3,123.20 × 621.30
  4. Step 4: Simplify right side
    2,082.13x = 1,940,444.16
  5. Step 5: Solve for x
    x = 1,940,444.16/2,082.13
  6. Step 6: Final answer
    x = 931.95

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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.