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Finding the Fourth Proportional to 605.92, 909.06 and 221.20

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Solution

The fourth proportional to 605.92, 909.06 and 221.20 is: 331.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.92 : 909.06 = 221.20 : x
  2. Step 2: Convert to fraction form
    605.92/909.06 = 221.20/x
  3. Step 3: Cross multiply
    605.92x = 909.06 × 221.20
  4. Step 4: Simplify right side
    605.92x = 201,084.07
  5. Step 5: Solve for x
    x = 201,084.07/605.92
  6. Step 6: Final answer
    x = 331.87

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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.