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Finding the Fourth Proportional to 283.31, 425.11 and 129.23

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Solution

The fourth proportional to 283.31, 425.11 and 129.23 is: 193.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.31 : 425.11 = 129.23 : x
  2. Step 2: Convert to fraction form
    283.31/425.11 = 129.23/x
  3. Step 3: Cross multiply
    283.31x = 425.11 × 129.23
  4. Step 4: Simplify right side
    283.31x = 54,934.84
  5. Step 5: Solve for x
    x = 54,934.84/283.31
  6. Step 6: Final answer
    x = 193.90

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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.