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Finding the Fourth Proportional to 754.99, 1,131.81 and 480.31

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Solution

The fourth proportional to 754.99, 1,131.81 and 480.31 is: 720.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.99 : 1,131.81 = 480.31 : x
  2. Step 2: Convert to fraction form
    754.99/1,131.81 = 480.31/x
  3. Step 3: Cross multiply
    754.99x = 1,131.81 × 480.31
  4. Step 4: Simplify right side
    754.99x = 543,619.66
  5. Step 5: Solve for x
    x = 543,619.66/754.99
  6. Step 6: Final answer
    x = 720.04

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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.