Home / 1,028.40-1,542.34-443.61

Finding the Fourth Proportional to 1,028.40, 1,542.34 and 443.61

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Solution

The fourth proportional to 1,028.40, 1,542.34 and 443.61 is: 665.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.40 : 1,542.34 = 443.61 : x
  2. Step 2: Convert to fraction form
    1,028.40/1,542.34 = 443.61/x
  3. Step 3: Cross multiply
    1,028.40x = 1,542.34 × 443.61
  4. Step 4: Simplify right side
    1,028.40x = 684,196.34
  5. Step 5: Solve for x
    x = 684,196.34/1,028.40
  6. Step 6: Final answer
    x = 665.30

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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.