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Finding the Fourth Proportional to 283.52, 391.40 and 172.96

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Solution

The fourth proportional to 283.52, 391.40 and 172.96 is: 238.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.52 : 391.40 = 172.96 : x
  2. Step 2: Convert to fraction form
    283.52/391.40 = 172.96/x
  3. Step 3: Cross multiply
    283.52x = 391.40 × 172.96
  4. Step 4: Simplify right side
    283.52x = 67,696.54
  5. Step 5: Solve for x
    x = 67,696.54/283.52
  6. Step 6: Final answer
    x = 238.77

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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.