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Finding the Fourth Proportional to 1,352.56, 2,028.87 and 378.64

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Solution

The fourth proportional to 1,352.56, 2,028.87 and 378.64 is: 567.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352.56 : 2,028.87 = 378.64 : x
  2. Step 2: Convert to fraction form
    1,352.56/2,028.87 = 378.64/x
  3. Step 3: Cross multiply
    1,352.56x = 2,028.87 × 378.64
  4. Step 4: Simplify right side
    1,352.56x = 768,211.34
  5. Step 5: Solve for x
    x = 768,211.34/1,352.56
  6. Step 6: Final answer
    x = 567.97

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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.