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Finding the Fourth Proportional to 283.76, 391.42 and 167.28

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Solution

The fourth proportional to 283.76, 391.42 and 167.28 is: 230.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.76 : 391.42 = 167.28 : x
  2. Step 2: Convert to fraction form
    283.76/391.42 = 167.28/x
  3. Step 3: Cross multiply
    283.76x = 391.42 × 167.28
  4. Step 4: Simplify right side
    283.76x = 65,476.74
  5. Step 5: Solve for x
    x = 65,476.74/283.76
  6. Step 6: Final answer
    x = 230.75

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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.