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Finding the Fourth Proportional to 271.73, 374.71 and 209.57

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Solution

The fourth proportional to 271.73, 374.71 and 209.57 is: 288.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.73 : 374.71 = 209.57 : x
  2. Step 2: Convert to fraction form
    271.73/374.71 = 209.57/x
  3. Step 3: Cross multiply
    271.73x = 374.71 × 209.57
  4. Step 4: Simplify right side
    271.73x = 78,526.93
  5. Step 5: Solve for x
    x = 78,526.93/271.73
  6. Step 6: Final answer
    x = 288.99

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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.