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Finding the Fourth Proportional to 756.24, 1,133.64 and 481.56

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Solution

The fourth proportional to 756.24, 1,133.64 and 481.56 is: 721.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.24 : 1,133.64 = 481.56 : x
  2. Step 2: Convert to fraction form
    756.24/1,133.64 = 481.56/x
  3. Step 3: Cross multiply
    756.24x = 1,133.64 × 481.56
  4. Step 4: Simplify right side
    756.24x = 545,915.68
  5. Step 5: Solve for x
    x = 545,915.68/756.24
  6. Step 6: Final answer
    x = 721.88

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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.