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Finding the Fourth Proportional to 263.07, 394.20 and 154.80

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Solution

The fourth proportional to 263.07, 394.20 and 154.80 is: 231.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.07 : 394.20 = 154.80 : x
  2. Step 2: Convert to fraction form
    263.07/394.20 = 154.80/x
  3. Step 3: Cross multiply
    263.07x = 394.20 × 154.80
  4. Step 4: Simplify right side
    263.07x = 61,022.16
  5. Step 5: Solve for x
    x = 61,022.16/263.07
  6. Step 6: Final answer
    x = 231.96

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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.