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Finding the Fourth Proportional to 1,101.28, 1,519.62 and 635.44

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Solution

The fourth proportional to 1,101.28, 1,519.62 and 635.44 is: 876.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.28 : 1,519.62 = 635.44 : x
  2. Step 2: Convert to fraction form
    1,101.28/1,519.62 = 635.44/x
  3. Step 3: Cross multiply
    1,101.28x = 1,519.62 × 635.44
  4. Step 4: Simplify right side
    1,101.28x = 965,627.33
  5. Step 5: Solve for x
    x = 965,627.33/1,101.28
  6. Step 6: Final answer
    x = 876.82

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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.