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Finding the Fourth Proportional to 512.27, 768.23 and 147.07

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Solution

The fourth proportional to 512.27, 768.23 and 147.07 is: 220.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.27 : 768.23 = 147.07 : x
  2. Step 2: Convert to fraction form
    512.27/768.23 = 147.07/x
  3. Step 3: Cross multiply
    512.27x = 768.23 × 147.07
  4. Step 4: Simplify right side
    512.27x = 112,980.87
  5. Step 5: Solve for x
    x = 112,980.87/512.27
  6. Step 6: Final answer
    x = 220.55

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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.