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Finding the Fourth Proportional to 363.94, 545.95 and 120.42

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Solution

The fourth proportional to 363.94, 545.95 and 120.42 is: 180.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.94 : 545.95 = 120.42 : x
  2. Step 2: Convert to fraction form
    363.94/545.95 = 120.42/x
  3. Step 3: Cross multiply
    363.94x = 545.95 × 120.42
  4. Step 4: Simplify right side
    363.94x = 65,743.30
  5. Step 5: Solve for x
    x = 65,743.30/363.94
  6. Step 6: Final answer
    x = 180.64

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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.