Home / 1,028.50-1,543.20-379.12

Finding the Fourth Proportional to 1,028.50, 1,543.20 and 379.12

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Solution

The fourth proportional to 1,028.50, 1,543.20 and 379.12 is: 568.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.50 : 1,543.20 = 379.12 : x
  2. Step 2: Convert to fraction form
    1,028.50/1,543.20 = 379.12/x
  3. Step 3: Cross multiply
    1,028.50x = 1,543.20 × 379.12
  4. Step 4: Simplify right side
    1,028.50x = 585,057.98
  5. Step 5: Solve for x
    x = 585,057.98/1,028.50
  6. Step 6: Final answer
    x = 568.85

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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.