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Finding the Fourth Proportional to 282.17, 389.31 and 171.69

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Solution

The fourth proportional to 282.17, 389.31 and 171.69 is: 236.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.17 : 389.31 = 171.69 : x
  2. Step 2: Convert to fraction form
    282.17/389.31 = 171.69/x
  3. Step 3: Cross multiply
    282.17x = 389.31 × 171.69
  4. Step 4: Simplify right side
    282.17x = 66,840.63
  5. Step 5: Solve for x
    x = 66,840.63/282.17
  6. Step 6: Final answer
    x = 236.88

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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.