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Finding the Fourth Proportional to 282.39, 389.55 and 171.84

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Solution

The fourth proportional to 282.39, 389.55 and 171.84 is: 237.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.39 : 389.55 = 171.84 : x
  2. Step 2: Convert to fraction form
    282.39/389.55 = 171.84/x
  3. Step 3: Cross multiply
    282.39x = 389.55 × 171.84
  4. Step 4: Simplify right side
    282.39x = 66,940.27
  5. Step 5: Solve for x
    x = 66,940.27/282.39
  6. Step 6: Final answer
    x = 237.05

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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.