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Finding the Fourth Proportional to 411.81, 565.43 and 401.11

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Solution

The fourth proportional to 411.81, 565.43 and 401.11 is: 550.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.81 : 565.43 = 401.11 : x
  2. Step 2: Convert to fraction form
    411.81/565.43 = 401.11/x
  3. Step 3: Cross multiply
    411.81x = 565.43 × 401.11
  4. Step 4: Simplify right side
    411.81x = 226,796.21
  5. Step 5: Solve for x
    x = 226,796.21/411.81
  6. Step 6: Final answer
    x = 550.73

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.