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Finding the Fourth Proportional to 329.27, 493.90 and 312.26

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Solution

The fourth proportional to 329.27, 493.90 and 312.26 is: 468.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    329.27 : 493.90 = 312.26 : x
  2. Step 2: Convert to fraction form
    329.27/493.90 = 312.26/x
  3. Step 3: Cross multiply
    329.27x = 493.90 × 312.26
  4. Step 4: Simplify right side
    329.27x = 154,221.96
  5. Step 5: Solve for x
    x = 154,221.96/329.27
  6. Step 6: Final answer
    x = 468.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.