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Finding the Fourth Proportional to 260.80, 391.28 and 158.24

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Solution

The fourth proportional to 260.80, 391.28 and 158.24 is: 237.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    260.80 : 391.28 = 158.24 : x
  2. Step 2: Convert to fraction form
    260.80/391.28 = 158.24/x
  3. Step 3: Cross multiply
    260.80x = 391.28 × 158.24
  4. Step 4: Simplify right side
    260.80x = 61,916.15
  5. Step 5: Solve for x
    x = 61,916.15/260.80
  6. Step 6: Final answer
    x = 237.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.