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Finding the Fourth Proportional to 329.88, 492.33 and 321.24

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Solution

The fourth proportional to 329.88, 492.33 and 321.24 is: 479.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.88 : 492.33 = 321.24 : x
  2. Step 2: Convert to fraction form
    329.88/492.33 = 321.24/x
  3. Step 3: Cross multiply
    329.88x = 492.33 × 321.24
  4. Step 4: Simplify right side
    329.88x = 158,156.09
  5. Step 5: Solve for x
    x = 158,156.09/329.88
  6. Step 6: Final answer
    x = 479.44

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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.