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Finding the Fourth Proportional to 666.56, 1,000.44 and 481.68

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Solution

The fourth proportional to 666.56, 1,000.44 and 481.68 is: 722.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.56 : 1,000.44 = 481.68 : x
  2. Step 2: Convert to fraction form
    666.56/1,000.44 = 481.68/x
  3. Step 3: Cross multiply
    666.56x = 1,000.44 × 481.68
  4. Step 4: Simplify right side
    666.56x = 481,891.94
  5. Step 5: Solve for x
    x = 481,891.94/666.56
  6. Step 6: Final answer
    x = 722.95

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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.