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Finding the Fourth Proportional to 283.67, 391.11 and 231.16

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Solution

The fourth proportional to 283.67, 391.11 and 231.16 is: 318.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.67 : 391.11 = 231.16 : x
  2. Step 2: Convert to fraction form
    283.67/391.11 = 231.16/x
  3. Step 3: Cross multiply
    283.67x = 391.11 × 231.16
  4. Step 4: Simplify right side
    283.67x = 90,407.14
  5. Step 5: Solve for x
    x = 90,407.14/283.67
  6. Step 6: Final answer
    x = 318.70

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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.