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Finding the Fourth Proportional to 514.20, 769.91 and 481.75

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Solution

The fourth proportional to 514.20, 769.91 and 481.75 is: 721.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.20 : 769.91 = 481.75 : x
  2. Step 2: Convert to fraction form
    514.20/769.91 = 481.75/x
  3. Step 3: Cross multiply
    514.20x = 769.91 × 481.75
  4. Step 4: Simplify right side
    514.20x = 370,899.81
  5. Step 5: Solve for x
    x = 370,899.81/514.20
  6. Step 6: Final answer
    x = 721.32

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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.