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Finding the Fourth Proportional to 635.11, 876.37 and 355.28

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Solution

The fourth proportional to 635.11, 876.37 and 355.28 is: 490.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.11 : 876.37 = 355.28 : x
  2. Step 2: Convert to fraction form
    635.11/876.37 = 355.28/x
  3. Step 3: Cross multiply
    635.11x = 876.37 × 355.28
  4. Step 4: Simplify right side
    635.11x = 311,353.24
  5. Step 5: Solve for x
    x = 311,353.24/635.11
  6. Step 6: Final answer
    x = 490.24

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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.