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Finding the Fourth Proportional to 479.91, 662.63 and 324.75

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Solution

The fourth proportional to 479.91, 662.63 and 324.75 is: 448.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.91 : 662.63 = 324.75 : x
  2. Step 2: Convert to fraction form
    479.91/662.63 = 324.75/x
  3. Step 3: Cross multiply
    479.91x = 662.63 × 324.75
  4. Step 4: Simplify right side
    479.91x = 215,187.47
  5. Step 5: Solve for x
    x = 215,187.47/479.91
  6. Step 6: Final answer
    x = 448.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.