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Finding the Fourth Proportional to 329.94, 455.22 and 316.44

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Solution

The fourth proportional to 329.94, 455.22 and 316.44 is: 436.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.94 : 455.22 = 316.44 : x
  2. Step 2: Convert to fraction form
    329.94/455.22 = 316.44/x
  3. Step 3: Cross multiply
    329.94x = 455.22 × 316.44
  4. Step 4: Simplify right side
    329.94x = 144,049.82
  5. Step 5: Solve for x
    x = 144,049.82/329.94
  6. Step 6: Final answer
    x = 436.59

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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.