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Finding the Fourth Proportional to 438.44, 605.06 and 261.39

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Solution

The fourth proportional to 438.44, 605.06 and 261.39 is: 360.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.44 : 605.06 = 261.39 : x
  2. Step 2: Convert to fraction form
    438.44/605.06 = 261.39/x
  3. Step 3: Cross multiply
    438.44x = 605.06 × 261.39
  4. Step 4: Simplify right side
    438.44x = 158,155.33
  5. Step 5: Solve for x
    x = 158,155.33/438.44
  6. Step 6: Final answer
    x = 360.73

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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.