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Finding the Fourth Proportional to 395.32, 545.34 and 329.80

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Solution

The fourth proportional to 395.32, 545.34 and 329.80 is: 454.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.32 : 545.34 = 329.80 : x
  2. Step 2: Convert to fraction form
    395.32/545.34 = 329.80/x
  3. Step 3: Cross multiply
    395.32x = 545.34 × 329.80
  4. Step 4: Simplify right side
    395.32x = 179,853.13
  5. Step 5: Solve for x
    x = 179,853.13/395.32
  6. Step 6: Final answer
    x = 454.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.