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Finding the Fourth Proportional to 369.48, 509.85 and 222.20

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Solution

The fourth proportional to 369.48, 509.85 and 222.20 is: 306.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.48 : 509.85 = 222.20 : x
  2. Step 2: Convert to fraction form
    369.48/509.85 = 222.20/x
  3. Step 3: Cross multiply
    369.48x = 509.85 × 222.20
  4. Step 4: Simplify right side
    369.48x = 113,286.12
  5. Step 5: Solve for x
    x = 113,286.12/369.48
  6. Step 6: Final answer
    x = 306.61

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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.