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Finding the Fourth Proportional to 423.60, 635.38 and 321.07

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Solution

The fourth proportional to 423.60, 635.38 and 321.07 is: 481.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.60 : 635.38 = 321.07 : x
  2. Step 2: Convert to fraction form
    423.60/635.38 = 321.07/x
  3. Step 3: Cross multiply
    423.60x = 635.38 × 321.07
  4. Step 4: Simplify right side
    423.60x = 204,001.46
  5. Step 5: Solve for x
    x = 204,001.46/423.60
  6. Step 6: Final answer
    x = 481.59

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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.