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Finding the Fourth Proportional to 721.01, 993.98 and 484.54

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Solution

The fourth proportional to 721.01, 993.98 and 484.54 is: 667.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.01 : 993.98 = 484.54 : x
  2. Step 2: Convert to fraction form
    721.01/993.98 = 484.54/x
  3. Step 3: Cross multiply
    721.01x = 993.98 × 484.54
  4. Step 4: Simplify right side
    721.01x = 481,621.80
  5. Step 5: Solve for x
    x = 481,621.80/721.01
  6. Step 6: Final answer
    x = 667.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.