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Finding the Fourth Proportional to 271.32, 405.90 and 189.96

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Solution

The fourth proportional to 271.32, 405.90 and 189.96 is: 284.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.32 : 405.90 = 189.96 : x
  2. Step 2: Convert to fraction form
    271.32/405.90 = 189.96/x
  3. Step 3: Cross multiply
    271.32x = 405.90 × 189.96
  4. Step 4: Simplify right side
    271.32x = 77,104.76
  5. Step 5: Solve for x
    x = 77,104.76/271.32
  6. Step 6: Final answer
    x = 284.18

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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.