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Finding the Fourth Proportional to 403.10, 605.02 and 220.68

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Solution

The fourth proportional to 403.10, 605.02 and 220.68 is: 331.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.10 : 605.02 = 220.68 : x
  2. Step 2: Convert to fraction form
    403.10/605.02 = 220.68/x
  3. Step 3: Cross multiply
    403.10x = 605.02 × 220.68
  4. Step 4: Simplify right side
    403.10x = 133,515.81
  5. Step 5: Solve for x
    x = 133,515.81/403.10
  6. Step 6: Final answer
    x = 331.22

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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.