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Finding the Fourth Proportional to 512.94, 769.38 and 188.16

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Solution

The fourth proportional to 512.94, 769.38 and 188.16 is: 282.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.94 : 769.38 = 188.16 : x
  2. Step 2: Convert to fraction form
    512.94/769.38 = 188.16/x
  3. Step 3: Cross multiply
    512.94x = 769.38 × 188.16
  4. Step 4: Simplify right side
    512.94x = 144,766.54
  5. Step 5: Solve for x
    x = 144,766.54/512.94
  6. Step 6: Final answer
    x = 282.23

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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.