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Finding the Fourth Proportional to 398.38, 550.03 and 293.59

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Solution

The fourth proportional to 398.38, 550.03 and 293.59 is: 405.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.38 : 550.03 = 293.59 : x
  2. Step 2: Convert to fraction form
    398.38/550.03 = 293.59/x
  3. Step 3: Cross multiply
    398.38x = 550.03 × 293.59
  4. Step 4: Simplify right side
    398.38x = 161,481.54
  5. Step 5: Solve for x
    x = 161,481.54/398.38
  6. Step 6: Final answer
    x = 405.35

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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.