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Finding the Fourth Proportional to 663.24, 994.86 and 321.16

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Solution

The fourth proportional to 663.24, 994.86 and 321.16 is: 481.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.24 : 994.86 = 321.16 : x
  2. Step 2: Convert to fraction form
    663.24/994.86 = 321.16/x
  3. Step 3: Cross multiply
    663.24x = 994.86 × 321.16
  4. Step 4: Simplify right side
    663.24x = 319,509.24
  5. Step 5: Solve for x
    x = 319,509.24/663.24
  6. Step 6: Final answer
    x = 481.74

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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.