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Finding the Fourth Proportional to 386.54, 533.44 and 239.12

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Solution

The fourth proportional to 386.54, 533.44 and 239.12 is: 329.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.54 : 533.44 = 239.12 : x
  2. Step 2: Convert to fraction form
    386.54/533.44 = 239.12/x
  3. Step 3: Cross multiply
    386.54x = 533.44 × 239.12
  4. Step 4: Simplify right side
    386.54x = 127,556.17
  5. Step 5: Solve for x
    x = 127,556.17/386.54
  6. Step 6: Final answer
    x = 329.99

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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.