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Finding the Fourth Proportional to 379.56, 524.03 and 239.70

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Solution

The fourth proportional to 379.56, 524.03 and 239.70 is: 330.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.56 : 524.03 = 239.70 : x
  2. Step 2: Convert to fraction form
    379.56/524.03 = 239.70/x
  3. Step 3: Cross multiply
    379.56x = 524.03 × 239.70
  4. Step 4: Simplify right side
    379.56x = 125,608.79
  5. Step 5: Solve for x
    x = 125,608.79/379.56
  6. Step 6: Final answer
    x = 330.93

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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.