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Finding the Fourth Proportional to 423.13, 635.27 and 217.84

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Solution

The fourth proportional to 423.13, 635.27 and 217.84 is: 327.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.13 : 635.27 = 217.84 : x
  2. Step 2: Convert to fraction form
    423.13/635.27 = 217.84/x
  3. Step 3: Cross multiply
    423.13x = 635.27 × 217.84
  4. Step 4: Simplify right side
    423.13x = 138,387.22
  5. Step 5: Solve for x
    x = 138,387.22/423.13
  6. Step 6: Final answer
    x = 327.06

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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.