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Finding the Fourth Proportional to 720.20, 994.44 and 484.35

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Solution

The fourth proportional to 720.20, 994.44 and 484.35 is: 668.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.20 : 994.44 = 484.35 : x
  2. Step 2: Convert to fraction form
    720.20/994.44 = 484.35/x
  3. Step 3: Cross multiply
    720.20x = 994.44 × 484.35
  4. Step 4: Simplify right side
    720.20x = 481,657.01
  5. Step 5: Solve for x
    x = 481,657.01/720.20
  6. Step 6: Final answer
    x = 668.79

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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.