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Finding the Fourth Proportional to 512.41, 768.30 and 203.90

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Solution

The fourth proportional to 512.41, 768.30 and 203.90 is: 305.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.41 : 768.30 = 203.90 : x
  2. Step 2: Convert to fraction form
    512.41/768.30 = 203.90/x
  3. Step 3: Cross multiply
    512.41x = 768.30 × 203.90
  4. Step 4: Simplify right side
    512.41x = 156,656.37
  5. Step 5: Solve for x
    x = 156,656.37/512.41
  6. Step 6: Final answer
    x = 305.72

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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.