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Finding the Fourth Proportional to 392.22, 588.12 and 118.23

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Solution

The fourth proportional to 392.22, 588.12 and 118.23 is: 177.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.22 : 588.12 = 118.23 : x
  2. Step 2: Convert to fraction form
    392.22/588.12 = 118.23/x
  3. Step 3: Cross multiply
    392.22x = 588.12 × 118.23
  4. Step 4: Simplify right side
    392.22x = 69,533.43
  5. Step 5: Solve for x
    x = 69,533.43/392.22
  6. Step 6: Final answer
    x = 177.28

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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.