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Finding the Fourth Proportional to 392.54, 588.62 and 118.56

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Solution

The fourth proportional to 392.54, 588.62 and 118.56 is: 177.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.54 : 588.62 = 118.56 : x
  2. Step 2: Convert to fraction form
    392.54/588.62 = 118.56/x
  3. Step 3: Cross multiply
    392.54x = 588.62 × 118.56
  4. Step 4: Simplify right side
    392.54x = 69,786.79
  5. Step 5: Solve for x
    x = 69,786.79/392.54
  6. Step 6: Final answer
    x = 177.78

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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.