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Finding the Fourth Proportional to 282.22, 389.49 and 171.72

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Solution

The fourth proportional to 282.22, 389.49 and 171.72 is: 236.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.22 : 389.49 = 171.72 : x
  2. Step 2: Convert to fraction form
    282.22/389.49 = 171.72/x
  3. Step 3: Cross multiply
    282.22x = 389.49 × 171.72
  4. Step 4: Simplify right side
    282.22x = 66,882.58
  5. Step 5: Solve for x
    x = 66,882.58/282.22
  6. Step 6: Final answer
    x = 236.99

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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.