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Finding the Fourth Proportional to 392.95, 590.79 and 329.37

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Solution

The fourth proportional to 392.95, 590.79 and 329.37 is: 495.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.95 : 590.79 = 329.37 : x
  2. Step 2: Convert to fraction form
    392.95/590.79 = 329.37/x
  3. Step 3: Cross multiply
    392.95x = 590.79 × 329.37
  4. Step 4: Simplify right side
    392.95x = 194,587.52
  5. Step 5: Solve for x
    x = 194,587.52/392.95
  6. Step 6: Final answer
    x = 495.20

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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.