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Finding the Fourth Proportional to 411.16, 571.27 and 406

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Solution

The fourth proportional to 411.16, 571.27 and 406 is: 564.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.16 : 571.27 = 406 : x
  2. Step 2: Convert to fraction form
    411.16/571.27 = 406/x
  3. Step 3: Cross multiply
    411.16x = 571.27 × 406
  4. Step 4: Simplify right side
    411.16x = 231,935.62
  5. Step 5: Solve for x
    x = 231,935.62/411.16
  6. Step 6: Final answer
    x = 564.10

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.