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Finding the Fourth Proportional to 303.49, 418.86 and 220.87

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Solution

The fourth proportional to 303.49, 418.86 and 220.87 is: 304.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    303.49 : 418.86 = 220.87 : x
  2. Step 2: Convert to fraction form
    303.49/418.86 = 220.87/x
  3. Step 3: Cross multiply
    303.49x = 418.86 × 220.87
  4. Step 4: Simplify right side
    303.49x = 92,513.61
  5. Step 5: Solve for x
    x = 92,513.61/303.49
  6. Step 6: Final answer
    x = 304.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.