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Finding the Fourth Proportional to 379.06, 522.98 and 231.76

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Solution

The fourth proportional to 379.06, 522.98 and 231.76 is: 319.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.06 : 522.98 = 231.76 : x
  2. Step 2: Convert to fraction form
    379.06/522.98 = 231.76/x
  3. Step 3: Cross multiply
    379.06x = 522.98 × 231.76
  4. Step 4: Simplify right side
    379.06x = 121,205.84
  5. Step 5: Solve for x
    x = 121,205.84/379.06
  6. Step 6: Final answer
    x = 319.75

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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.