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Finding the Fourth Proportional to 282.67, 423.94 and 120.31

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Solution

The fourth proportional to 282.67, 423.94 and 120.31 is: 180.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.67 : 423.94 = 120.31 : x
  2. Step 2: Convert to fraction form
    282.67/423.94 = 120.31/x
  3. Step 3: Cross multiply
    282.67x = 423.94 × 120.31
  4. Step 4: Simplify right side
    282.67x = 51,004.22
  5. Step 5: Solve for x
    x = 51,004.22/282.67
  6. Step 6: Final answer
    x = 180.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.