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Finding the Fourth Proportional to 636.30, 878.02 and 356.51

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Solution

The fourth proportional to 636.30, 878.02 and 356.51 is: 491.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.30 : 878.02 = 356.51 : x
  2. Step 2: Convert to fraction form
    636.30/878.02 = 356.51/x
  3. Step 3: Cross multiply
    636.30x = 878.02 × 356.51
  4. Step 4: Simplify right side
    636.30x = 313,024.21
  5. Step 5: Solve for x
    x = 313,024.21/636.30
  6. Step 6: Final answer
    x = 491.94

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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.