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Finding the Fourth Proportional to 379.49, 524.01 and 239.84

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Solution

The fourth proportional to 379.49, 524.01 and 239.84 is: 331.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.49 : 524.01 = 239.84 : x
  2. Step 2: Convert to fraction form
    379.49/524.01 = 239.84/x
  3. Step 3: Cross multiply
    379.49x = 524.01 × 239.84
  4. Step 4: Simplify right side
    379.49x = 125,678.56
  5. Step 5: Solve for x
    x = 125,678.56/379.49
  6. Step 6: Final answer
    x = 331.18

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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.