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Finding the Fourth Proportional to 438.44, 605.01 and 261.41

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Solution

The fourth proportional to 438.44, 605.01 and 261.41 is: 360.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.44 : 605.01 = 261.41 : x
  2. Step 2: Convert to fraction form
    438.44/605.01 = 261.41/x
  3. Step 3: Cross multiply
    438.44x = 605.01 × 261.41
  4. Step 4: Simplify right side
    438.44x = 158,154.15
  5. Step 5: Solve for x
    x = 158,154.15/438.44
  6. Step 6: Final answer
    x = 360.72

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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.