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Finding the Fourth Proportional to 329, 454.06 and 189.15

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Solution

The fourth proportional to 329, 454.06 and 189.15 is: 261.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    329 : 454.06 = 189.15 : x
  2. Step 2: Convert to fraction form
    329/454.06 = 189.15/x
  3. Step 3: Cross multiply
    329x = 454.06 × 189.15
  4. Step 4: Simplify right side
    329x = 85,885.45
  5. Step 5: Solve for x
    x = 85,885.45/329
  6. Step 6: Final answer
    x = 261.05

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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.