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Finding the Fourth Proportional to 403.03, 605.09 and 220.51

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Solution

The fourth proportional to 403.03, 605.09 and 220.51 is: 331.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.03 : 605.09 = 220.51 : x
  2. Step 2: Convert to fraction form
    403.03/605.09 = 220.51/x
  3. Step 3: Cross multiply
    403.03x = 605.09 × 220.51
  4. Step 4: Simplify right side
    403.03x = 133,428.40
  5. Step 5: Solve for x
    x = 133,428.40/403.03
  6. Step 6: Final answer
    x = 331.06

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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.