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Finding the Fourth Proportional to 635.36, 876.72 and 355.61

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Solution

The fourth proportional to 635.36, 876.72 and 355.61 is: 490.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.36 : 876.72 = 355.61 : x
  2. Step 2: Convert to fraction form
    635.36/876.72 = 355.61/x
  3. Step 3: Cross multiply
    635.36x = 876.72 × 355.61
  4. Step 4: Simplify right side
    635.36x = 311,768.62
  5. Step 5: Solve for x
    x = 311,768.62/635.36
  6. Step 6: Final answer
    x = 490.70

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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.