Home / 2,123.19-3,183.87-661.95

Finding the Fourth Proportional to 2,123.19, 3,183.87 and 661.95

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Solution

The fourth proportional to 2,123.19, 3,183.87 and 661.95 is: 992.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,123.19 : 3,183.87 = 661.95 : x
  2. Step 2: Convert to fraction form
    2,123.19/3,183.87 = 661.95/x
  3. Step 3: Cross multiply
    2,123.19x = 3,183.87 × 661.95
  4. Step 4: Simplify right side
    2,123.19x = 2,107,562.75
  5. Step 5: Solve for x
    x = 2,107,562.75/2,123.19
  6. Step 6: Final answer
    x = 992.64

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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.