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Finding the Fourth Proportional to 379.37, 523.28 and 239.36

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Solution

The fourth proportional to 379.37, 523.28 and 239.36 is: 330.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.37 : 523.28 = 239.36 : x
  2. Step 2: Convert to fraction form
    379.37/523.28 = 239.36/x
  3. Step 3: Cross multiply
    379.37x = 523.28 × 239.36
  4. Step 4: Simplify right side
    379.37x = 125,254.21
  5. Step 5: Solve for x
    x = 125,254.21/379.37
  6. Step 6: Final answer
    x = 330.17

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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.