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Finding the Fourth Proportional to 281.91, 388.95 and 171.36

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Solution

The fourth proportional to 281.91, 388.95 and 171.36 is: 236.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.91 : 388.95 = 171.36 : x
  2. Step 2: Convert to fraction form
    281.91/388.95 = 171.36/x
  3. Step 3: Cross multiply
    281.91x = 388.95 × 171.36
  4. Step 4: Simplify right side
    281.91x = 66,650.47
  5. Step 5: Solve for x
    x = 66,650.47/281.91
  6. Step 6: Final answer
    x = 236.42

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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.