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Finding the Fourth Proportional to 276.16, 380.89 and 239.25

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Solution

The fourth proportional to 276.16, 380.89 and 239.25 is: 329.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    276.16 : 380.89 = 239.25 : x
  2. Step 2: Convert to fraction form
    276.16/380.89 = 239.25/x
  3. Step 3: Cross multiply
    276.16x = 380.89 × 239.25
  4. Step 4: Simplify right side
    276.16x = 91,127.33
  5. Step 5: Solve for x
    x = 91,127.33/276.16
  6. Step 6: Final answer
    x = 329.98

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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.