Home / 1,352.21-2,028.29-427.73

Finding the Fourth Proportional to 1,352.21, 2,028.29 and 427.73

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Solution

The fourth proportional to 1,352.21, 2,028.29 and 427.73 is: 641.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352.21 : 2,028.29 = 427.73 : x
  2. Step 2: Convert to fraction form
    1,352.21/2,028.29 = 427.73/x
  3. Step 3: Cross multiply
    1,352.21x = 2,028.29 × 427.73
  4. Step 4: Simplify right side
    1,352.21x = 867,548.20
  5. Step 5: Solve for x
    x = 867,548.20/1,352.21
  6. Step 6: Final answer
    x = 641.58

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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.