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Finding the Fourth Proportional to 512.60, 768.98 and 238.55

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Solution

The fourth proportional to 512.60, 768.98 and 238.55 is: 357.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.60 : 768.98 = 238.55 : x
  2. Step 2: Convert to fraction form
    512.60/768.98 = 238.55/x
  3. Step 3: Cross multiply
    512.60x = 768.98 × 238.55
  4. Step 4: Simplify right side
    512.60x = 183,436.93
  5. Step 5: Solve for x
    x = 183,436.93/512.60
  6. Step 6: Final answer
    x = 357.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.