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Finding the Fourth Proportional to 730.59, 1,008.39 and 481.95

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Solution

The fourth proportional to 730.59, 1,008.39 and 481.95 is: 665.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.59 : 1,008.39 = 481.95 : x
  2. Step 2: Convert to fraction form
    730.59/1,008.39 = 481.95/x
  3. Step 3: Cross multiply
    730.59x = 1,008.39 × 481.95
  4. Step 4: Simplify right side
    730.59x = 485,993.56
  5. Step 5: Solve for x
    x = 485,993.56/730.59
  6. Step 6: Final answer
    x = 665.21

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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.