Home / 1,352.31-2,028.67-427.56

Finding the Fourth Proportional to 1,352.31, 2,028.67 and 427.56

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Solution

The fourth proportional to 1,352.31, 2,028.67 and 427.56 is: 641.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352.31 : 2,028.67 = 427.56 : x
  2. Step 2: Convert to fraction form
    1,352.31/2,028.67 = 427.56/x
  3. Step 3: Cross multiply
    1,352.31x = 2,028.67 × 427.56
  4. Step 4: Simplify right side
    1,352.31x = 867,378.15
  5. Step 5: Solve for x
    x = 867,378.15/1,352.31
  6. Step 6: Final answer
    x = 641.40

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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.