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Finding the Fourth Proportional to 392.57, 588.64 and 187.19

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Solution

The fourth proportional to 392.57, 588.64 and 187.19 is: 280.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.57 : 588.64 = 187.19 : x
  2. Step 2: Convert to fraction form
    392.57/588.64 = 187.19/x
  3. Step 3: Cross multiply
    392.57x = 588.64 × 187.19
  4. Step 4: Simplify right side
    392.57x = 110,183.64
  5. Step 5: Solve for x
    x = 110,183.64/392.57
  6. Step 6: Final answer
    x = 280.68

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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.