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Finding the Fourth Proportional to 271.57, 374.55 and 238.75

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Solution

The fourth proportional to 271.57, 374.55 and 238.75 is: 329.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.57 : 374.55 = 238.75 : x
  2. Step 2: Convert to fraction form
    271.57/374.55 = 238.75/x
  3. Step 3: Cross multiply
    271.57x = 374.55 × 238.75
  4. Step 4: Simplify right side
    271.57x = 89,423.81
  5. Step 5: Solve for x
    x = 89,423.81/271.57
  6. Step 6: Final answer
    x = 329.28

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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.