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Finding the Fourth Proportional to 756.54, 1,134.34 and 513.24

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Solution

The fourth proportional to 756.54, 1,134.34 and 513.24 is: 769.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.54 : 1,134.34 = 513.24 : x
  2. Step 2: Convert to fraction form
    756.54/1,134.34 = 513.24/x
  3. Step 3: Cross multiply
    756.54x = 1,134.34 × 513.24
  4. Step 4: Simplify right side
    756.54x = 582,183.12
  5. Step 5: Solve for x
    x = 582,183.12/756.54
  6. Step 6: Final answer
    x = 769.53

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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.