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Finding the Fourth Proportional to 403.43, 604.65 and 220.55

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Solution

The fourth proportional to 403.43, 604.65 and 220.55 is: 330.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.43 : 604.65 = 220.55 : x
  2. Step 2: Convert to fraction form
    403.43/604.65 = 220.55/x
  3. Step 3: Cross multiply
    403.43x = 604.65 × 220.55
  4. Step 4: Simplify right side
    403.43x = 133,355.56
  5. Step 5: Solve for x
    x = 133,355.56/403.43
  6. Step 6: Final answer
    x = 330.55

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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.