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Finding the Fourth Proportional to 636.36, 878.12 and 352.76

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Solution

The fourth proportional to 636.36, 878.12 and 352.76 is: 486.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.36 : 878.12 = 352.76 : x
  2. Step 2: Convert to fraction form
    636.36/878.12 = 352.76/x
  3. Step 3: Cross multiply
    636.36x = 878.12 × 352.76
  4. Step 4: Simplify right side
    636.36x = 309,765.61
  5. Step 5: Solve for x
    x = 309,765.61/636.36
  6. Step 6: Final answer
    x = 486.78

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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.