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Finding the Fourth Proportional to 363.12, 543.78 and 216.51

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Solution

The fourth proportional to 363.12, 543.78 and 216.51 is: 324.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    363.12 : 543.78 = 216.51 : x
  2. Step 2: Convert to fraction form
    363.12/543.78 = 216.51/x
  3. Step 3: Cross multiply
    363.12x = 543.78 × 216.51
  4. Step 4: Simplify right side
    363.12x = 117,733.81
  5. Step 5: Solve for x
    x = 117,733.81/363.12
  6. Step 6: Final answer
    x = 324.23

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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.