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Finding the Fourth Proportional to 271.29, 406.47 and 213.88

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Solution

The fourth proportional to 271.29, 406.47 and 213.88 is: 320.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    271.29 : 406.47 = 213.88 : x
  2. Step 2: Convert to fraction form
    271.29/406.47 = 213.88/x
  3. Step 3: Cross multiply
    271.29x = 406.47 × 213.88
  4. Step 4: Simplify right side
    271.29x = 86,935.80
  5. Step 5: Solve for x
    x = 86,935.80/271.29
  6. Step 6: Final answer
    x = 320.45

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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.