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Finding the Fourth Proportional to 271.34, 374.35 and 178.21

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Solution

The fourth proportional to 271.34, 374.35 and 178.21 is: 245.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.34 : 374.35 = 178.21 : x
  2. Step 2: Convert to fraction form
    271.34/374.35 = 178.21/x
  3. Step 3: Cross multiply
    271.34x = 374.35 × 178.21
  4. Step 4: Simplify right side
    271.34x = 66,710.15
  5. Step 5: Solve for x
    x = 66,710.15/271.34
  6. Step 6: Final answer
    x = 245.85

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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.