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Finding the Fourth Proportional to 439.06, 605.80 and 261.94

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Solution

The fourth proportional to 439.06, 605.80 and 261.94 is: 361.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.06 : 605.80 = 261.94 : x
  2. Step 2: Convert to fraction form
    439.06/605.80 = 261.94/x
  3. Step 3: Cross multiply
    439.06x = 605.80 × 261.94
  4. Step 4: Simplify right side
    439.06x = 158,680.93
  5. Step 5: Solve for x
    x = 158,680.93/439.06
  6. Step 6: Final answer
    x = 361.41

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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.