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Finding the Fourth Proportional to 425.18, 636.44 and 327.43

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Solution

The fourth proportional to 425.18, 636.44 and 327.43 is: 490.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.18 : 636.44 = 327.43 : x
  2. Step 2: Convert to fraction form
    425.18/636.44 = 327.43/x
  3. Step 3: Cross multiply
    425.18x = 636.44 × 327.43
  4. Step 4: Simplify right side
    425.18x = 208,386.37
  5. Step 5: Solve for x
    x = 208,386.37/425.18
  6. Step 6: Final answer
    x = 490.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.