Home / 1,028.15-1,542.42-378.89

Finding the Fourth Proportional to 1,028.15, 1,542.42 and 378.89

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Solution

The fourth proportional to 1,028.15, 1,542.42 and 378.89 is: 568.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.15 : 1,542.42 = 378.89 : x
  2. Step 2: Convert to fraction form
    1,028.15/1,542.42 = 378.89/x
  3. Step 3: Cross multiply
    1,028.15x = 1,542.42 × 378.89
  4. Step 4: Simplify right side
    1,028.15x = 584,407.51
  5. Step 5: Solve for x
    x = 584,407.51/1,028.15
  6. Step 6: Final answer
    x = 568.41

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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.