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Finding the Fourth Proportional to 1,352.80, 2,028.80 and 378.92

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Solution

The fourth proportional to 1,352.80, 2,028.80 and 378.92 is: 568.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352.80 : 2,028.80 = 378.92 : x
  2. Step 2: Convert to fraction form
    1,352.80/2,028.80 = 378.92/x
  3. Step 3: Cross multiply
    1,352.80x = 2,028.80 × 378.92
  4. Step 4: Simplify right side
    1,352.80x = 768,752.90
  5. Step 5: Solve for x
    x = 768,752.90/1,352.80
  6. Step 6: Final answer
    x = 568.27

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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.