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Finding the Fourth Proportional to 442.76, 663.58 and 321.08

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Solution

The fourth proportional to 442.76, 663.58 and 321.08 is: 481.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.76 : 663.58 = 321.08 : x
  2. Step 2: Convert to fraction form
    442.76/663.58 = 321.08/x
  3. Step 3: Cross multiply
    442.76x = 663.58 × 321.08
  4. Step 4: Simplify right side
    442.76x = 213,062.27
  5. Step 5: Solve for x
    x = 213,062.27/442.76
  6. Step 6: Final answer
    x = 481.21

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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.