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Finding the Fourth Proportional to 386.89, 534.00 and 239.44

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Solution

The fourth proportional to 386.89, 534.00 and 239.44 is: 330.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.89 : 534.00 = 239.44 : x
  2. Step 2: Convert to fraction form
    386.89/534.00 = 239.44/x
  3. Step 3: Cross multiply
    386.89x = 534.00 × 239.44
  4. Step 4: Simplify right side
    386.89x = 127,860.52
  5. Step 5: Solve for x
    x = 127,860.52/386.89
  6. Step 6: Final answer
    x = 330.48

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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.