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Finding the Fourth Proportional to 392.88, 589.23 and 149.43

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Solution

The fourth proportional to 392.88, 589.23 and 149.43 is: 224.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.88 : 589.23 = 149.43 : x
  2. Step 2: Convert to fraction form
    392.88/589.23 = 149.43/x
  3. Step 3: Cross multiply
    392.88x = 589.23 × 149.43
  4. Step 4: Simplify right side
    392.88x = 88,048.64
  5. Step 5: Solve for x
    x = 88,048.64/392.88
  6. Step 6: Final answer
    x = 224.11

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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.