Home / 1,638.21-2,453.54-1,313.85

Finding the Fourth Proportional to 1,638.21, 2,453.54 and 1,313.85

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Solution

The fourth proportional to 1,638.21, 2,453.54 and 1,313.85 is: 1,967.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.21 : 2,453.54 = 1,313.85 : x
  2. Step 2: Convert to fraction form
    1,638.21/2,453.54 = 1,313.85/x
  3. Step 3: Cross multiply
    1,638.21x = 2,453.54 × 1,313.85
  4. Step 4: Simplify right side
    1,638.21x = 3,223,576.96
  5. Step 5: Solve for x
    x = 3,223,576.96/1,638.21
  6. Step 6: Final answer
    x = 1,967.74

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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.