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Finding the Fourth Proportional to 1,028.03, 1,542.48 and 378.61

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Solution

The fourth proportional to 1,028.03, 1,542.48 and 378.61 is: 568.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.03 : 1,542.48 = 378.61 : x
  2. Step 2: Convert to fraction form
    1,028.03/1,542.48 = 378.61/x
  3. Step 3: Cross multiply
    1,028.03x = 1,542.48 × 378.61
  4. Step 4: Simplify right side
    1,028.03x = 583,990.64
  5. Step 5: Solve for x
    x = 583,990.64/1,028.03
  6. Step 6: Final answer
    x = 568.07

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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.