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Finding the Fourth Proportional to 293.90, 405.38 and 238.64

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Solution

The fourth proportional to 293.90, 405.38 and 238.64 is: 329.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.90 : 405.38 = 238.64 : x
  2. Step 2: Convert to fraction form
    293.90/405.38 = 238.64/x
  3. Step 3: Cross multiply
    293.90x = 405.38 × 238.64
  4. Step 4: Simplify right side
    293.90x = 96,739.88
  5. Step 5: Solve for x
    x = 96,739.88/293.90
  6. Step 6: Final answer
    x = 329.16

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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.