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Finding the Fourth Proportional to 329.26, 454.15 and 218.70

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Solution

The fourth proportional to 329.26, 454.15 and 218.70 is: 301.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.26 : 454.15 = 218.70 : x
  2. Step 2: Convert to fraction form
    329.26/454.15 = 218.70/x
  3. Step 3: Cross multiply
    329.26x = 454.15 × 218.70
  4. Step 4: Simplify right side
    329.26x = 99,322.61
  5. Step 5: Solve for x
    x = 99,322.61/329.26
  6. Step 6: Final answer
    x = 301.65

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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.