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Finding the Fourth Proportional to 512.69, 769.14 and 220.19

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Solution

The fourth proportional to 512.69, 769.14 and 220.19 is: 330.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.69 : 769.14 = 220.19 : x
  2. Step 2: Convert to fraction form
    512.69/769.14 = 220.19/x
  3. Step 3: Cross multiply
    512.69x = 769.14 × 220.19
  4. Step 4: Simplify right side
    512.69x = 169,356.94
  5. Step 5: Solve for x
    x = 169,356.94/512.69
  6. Step 6: Final answer
    x = 330.33

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.