Home / 1,028.40-1,418.61-635.14

Finding the Fourth Proportional to 1,028.40, 1,418.61 and 635.14

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Solution

The fourth proportional to 1,028.40, 1,418.61 and 635.14 is: 876.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.40 : 1,418.61 = 635.14 : x
  2. Step 2: Convert to fraction form
    1,028.40/1,418.61 = 635.14/x
  3. Step 3: Cross multiply
    1,028.40x = 1,418.61 × 635.14
  4. Step 4: Simplify right side
    1,028.40x = 901,015.96
  5. Step 5: Solve for x
    x = 901,015.96/1,028.40
  6. Step 6: Final answer
    x = 876.13

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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.