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Finding the Fourth Proportional to 283.44, 391.07 and 172.89

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Solution

The fourth proportional to 283.44, 391.07 and 172.89 is: 238.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.44 : 391.07 = 172.89 : x
  2. Step 2: Convert to fraction form
    283.44/391.07 = 172.89/x
  3. Step 3: Cross multiply
    283.44x = 391.07 × 172.89
  4. Step 4: Simplify right side
    283.44x = 67,611.23
  5. Step 5: Solve for x
    x = 67,611.23/283.44
  6. Step 6: Final answer
    x = 238.54

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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.