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Finding the Fourth Proportional to 512.96, 769.42 and 188.42

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Solution

The fourth proportional to 512.96, 769.42 and 188.42 is: 282.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.96 : 769.42 = 188.42 : x
  2. Step 2: Convert to fraction form
    512.96/769.42 = 188.42/x
  3. Step 3: Cross multiply
    512.96x = 769.42 × 188.42
  4. Step 4: Simplify right side
    512.96x = 144,974.12
  5. Step 5: Solve for x
    x = 144,974.12/512.96
  6. Step 6: Final answer
    x = 282.62

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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.