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Finding the Fourth Proportional to 247.85, 369.87 and 220.50

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Solution

The fourth proportional to 247.85, 369.87 and 220.50 is: 329.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.85 : 369.87 = 220.50 : x
  2. Step 2: Convert to fraction form
    247.85/369.87 = 220.50/x
  3. Step 3: Cross multiply
    247.85x = 369.87 × 220.50
  4. Step 4: Simplify right side
    247.85x = 81,556.34
  5. Step 5: Solve for x
    x = 81,556.34/247.85
  6. Step 6: Final answer
    x = 329.06

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.