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Finding the Fourth Proportional to 283.91, 391.85 and 167.47

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Solution

The fourth proportional to 283.91, 391.85 and 167.47 is: 231.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.91 : 391.85 = 167.47 : x
  2. Step 2: Convert to fraction form
    283.91/391.85 = 167.47/x
  3. Step 3: Cross multiply
    283.91x = 391.85 × 167.47
  4. Step 4: Simplify right side
    283.91x = 65,623.12
  5. Step 5: Solve for x
    x = 65,623.12/283.91
  6. Step 6: Final answer
    x = 231.14

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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.