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Finding the Fourth Proportional to 514.24, 769.80 and 331.80

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Solution

The fourth proportional to 514.24, 769.80 and 331.80 is: 496.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.24 : 769.80 = 331.80 : x
  2. Step 2: Convert to fraction form
    514.24/769.80 = 331.80/x
  3. Step 3: Cross multiply
    514.24x = 769.80 × 331.80
  4. Step 4: Simplify right side
    514.24x = 255,419.64
  5. Step 5: Solve for x
    x = 255,419.64/514.24
  6. Step 6: Final answer
    x = 496.69

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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.