Home / 1,028.20-1,419.04-635.36

Finding the Fourth Proportional to 1,028.20, 1,419.04 and 635.36

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Solution

The fourth proportional to 1,028.20, 1,419.04 and 635.36 is: 876.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.20 : 1,419.04 = 635.36 : x
  2. Step 2: Convert to fraction form
    1,028.20/1,419.04 = 635.36/x
  3. Step 3: Cross multiply
    1,028.20x = 1,419.04 × 635.36
  4. Step 4: Simplify right side
    1,028.20x = 901,601.25
  5. Step 5: Solve for x
    x = 901,601.25/1,028.20
  6. Step 6: Final answer
    x = 876.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.