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Finding the Fourth Proportional to 392.24, 588.20 and 186.60

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Solution

The fourth proportional to 392.24, 588.20 and 186.60 is: 279.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.24 : 588.20 = 186.60 : x
  2. Step 2: Convert to fraction form
    392.24/588.20 = 186.60/x
  3. Step 3: Cross multiply
    392.24x = 588.20 × 186.60
  4. Step 4: Simplify right side
    392.24x = 109,758.12
  5. Step 5: Solve for x
    x = 109,758.12/392.24
  6. Step 6: Final answer
    x = 279.82

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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.