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Finding the Fourth Proportional to 271.35, 374.36 and 209.12

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Solution

The fourth proportional to 271.35, 374.36 and 209.12 is: 288.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.35 : 374.36 = 209.12 : x
  2. Step 2: Convert to fraction form
    271.35/374.36 = 209.12/x
  3. Step 3: Cross multiply
    271.35x = 374.36 × 209.12
  4. Step 4: Simplify right side
    271.35x = 78,283.25
  5. Step 5: Solve for x
    x = 78,283.25/271.35
  6. Step 6: Final answer
    x = 288.50

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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.