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Finding the Fourth Proportional to 403.34, 605.18 and 220.52

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Solution

The fourth proportional to 403.34, 605.18 and 220.52 is: 330.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.34 : 605.18 = 220.52 : x
  2. Step 2: Convert to fraction form
    403.34/605.18 = 220.52/x
  3. Step 3: Cross multiply
    403.34x = 605.18 × 220.52
  4. Step 4: Simplify right side
    403.34x = 133,454.29
  5. Step 5: Solve for x
    x = 133,454.29/403.34
  6. Step 6: Final answer
    x = 330.87

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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.