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Finding the Fourth Proportional to 363.94, 545.70 and 129.56

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Solution

The fourth proportional to 363.94, 545.70 and 129.56 is: 194.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.94 : 545.70 = 129.56 : x
  2. Step 2: Convert to fraction form
    363.94/545.70 = 129.56/x
  3. Step 3: Cross multiply
    363.94x = 545.70 × 129.56
  4. Step 4: Simplify right side
    363.94x = 70,698.16
  5. Step 5: Solve for x
    x = 70,698.16/363.94
  6. Step 6: Final answer
    x = 194.26

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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.