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Finding the Fourth Proportional to 379.56, 524.02 and 239.74

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Solution

The fourth proportional to 379.56, 524.02 and 239.74 is: 330.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.56 : 524.02 = 239.74 : x
  2. Step 2: Convert to fraction form
    379.56/524.02 = 239.74/x
  3. Step 3: Cross multiply
    379.56x = 524.02 × 239.74
  4. Step 4: Simplify right side
    379.56x = 125,628.55
  5. Step 5: Solve for x
    x = 125,628.55/379.56
  6. Step 6: Final answer
    x = 330.98

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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.