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Finding the Fourth Proportional to 411.03, 567.43 and 261.81

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Solution

The fourth proportional to 411.03, 567.43 and 261.81 is: 361.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.03 : 567.43 = 261.81 : x
  2. Step 2: Convert to fraction form
    411.03/567.43 = 261.81/x
  3. Step 3: Cross multiply
    411.03x = 567.43 × 261.81
  4. Step 4: Simplify right side
    411.03x = 148,558.85
  5. Step 5: Solve for x
    x = 148,558.85/411.03
  6. Step 6: Final answer
    x = 361.43

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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.