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Finding the Fourth Proportional to 392.70, 588.51 and 161.31

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Solution

The fourth proportional to 392.70, 588.51 and 161.31 is: 241.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.70 : 588.51 = 161.31 : x
  2. Step 2: Convert to fraction form
    392.70/588.51 = 161.31/x
  3. Step 3: Cross multiply
    392.70x = 588.51 × 161.31
  4. Step 4: Simplify right side
    392.70x = 94,932.55
  5. Step 5: Solve for x
    x = 94,932.55/392.70
  6. Step 6: Final answer
    x = 241.74

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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.