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Finding the Fourth Proportional to 423.37, 635.44 and 218.08

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Solution

The fourth proportional to 423.37, 635.44 and 218.08 is: 327.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.37 : 635.44 = 218.08 : x
  2. Step 2: Convert to fraction form
    423.37/635.44 = 218.08/x
  3. Step 3: Cross multiply
    423.37x = 635.44 × 218.08
  4. Step 4: Simplify right side
    423.37x = 138,576.76
  5. Step 5: Solve for x
    x = 138,576.76/423.37
  6. Step 6: Final answer
    x = 327.32

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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.