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Finding the Fourth Proportional to 720.36, 993.96 and 484.68

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Solution

The fourth proportional to 720.36, 993.96 and 484.68 is: 668.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.36 : 993.96 = 484.68 : x
  2. Step 2: Convert to fraction form
    720.36/993.96 = 484.68/x
  3. Step 3: Cross multiply
    720.36x = 993.96 × 484.68
  4. Step 4: Simplify right side
    720.36x = 481,752.53
  5. Step 5: Solve for x
    x = 481,752.53/720.36
  6. Step 6: Final answer
    x = 668.77

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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.