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Finding the Fourth Proportional to 392.04, 588.36 and 388.40

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Solution

The fourth proportional to 392.04, 588.36 and 388.40 is: 582.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.04 : 588.36 = 388.40 : x
  2. Step 2: Convert to fraction form
    392.04/588.36 = 388.40/x
  3. Step 3: Cross multiply
    392.04x = 588.36 × 388.40
  4. Step 4: Simplify right side
    392.04x = 228,517.54
  5. Step 5: Solve for x
    x = 228,517.54/392.04
  6. Step 6: Final answer
    x = 582.89

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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.