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Finding the Fourth Proportional to 439, 605.91 and 261.97

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Solution

The fourth proportional to 439, 605.91 and 261.97 is: 361.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    439 : 605.91 = 261.97 : x
  2. Step 2: Convert to fraction form
    439/605.91 = 261.97/x
  3. Step 3: Cross multiply
    439x = 605.91 × 261.97
  4. Step 4: Simplify right side
    439x = 158,730.24
  5. Step 5: Solve for x
    x = 158,730.24/439
  6. Step 6: Final answer
    x = 361.57

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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.