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Finding the Fourth Proportional to 329.86, 491.31 and 325.59

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Solution

The fourth proportional to 329.86, 491.31 and 325.59 is: 484.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.86 : 491.31 = 325.59 : x
  2. Step 2: Convert to fraction form
    329.86/491.31 = 325.59/x
  3. Step 3: Cross multiply
    329.86x = 491.31 × 325.59
  4. Step 4: Simplify right side
    329.86x = 159,965.62
  5. Step 5: Solve for x
    x = 159,965.62/329.86
  6. Step 6: Final answer
    x = 484.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.