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Finding the Fourth Proportional to 363.84, 545.62 and 120.30

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Solution

The fourth proportional to 363.84, 545.62 and 120.30 is: 180.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.84 : 545.62 = 120.30 : x
  2. Step 2: Convert to fraction form
    363.84/545.62 = 120.30/x
  3. Step 3: Cross multiply
    363.84x = 545.62 × 120.30
  4. Step 4: Simplify right side
    363.84x = 65,638.09
  5. Step 5: Solve for x
    x = 65,638.09/363.84
  6. Step 6: Final answer
    x = 180.40

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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.