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Finding the Fourth Proportional to 578.54, 867.81 and 193.79

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Solution

The fourth proportional to 578.54, 867.81 and 193.79 is: 290.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.54 : 867.81 = 193.79 : x
  2. Step 2: Convert to fraction form
    578.54/867.81 = 193.79/x
  3. Step 3: Cross multiply
    578.54x = 867.81 × 193.79
  4. Step 4: Simplify right side
    578.54x = 168,168.56
  5. Step 5: Solve for x
    x = 168,168.56/578.54
  6. Step 6: Final answer
    x = 290.68

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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.