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Finding the Fourth Proportional to 478.93, 660.62 and 329.49

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Solution

The fourth proportional to 478.93, 660.62 and 329.49 is: 454.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.93 : 660.62 = 329.49 : x
  2. Step 2: Convert to fraction form
    478.93/660.62 = 329.49/x
  3. Step 3: Cross multiply
    478.93x = 660.62 × 329.49
  4. Step 4: Simplify right side
    478.93x = 217,662.73
  5. Step 5: Solve for x
    x = 217,662.73/478.93
  6. Step 6: Final answer
    x = 454.48

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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.