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Finding the Fourth Proportional to 247.45, 339.00 and 238.21

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Solution

The fourth proportional to 247.45, 339.00 and 238.21 is: 326.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.45 : 339.00 = 238.21 : x
  2. Step 2: Convert to fraction form
    247.45/339.00 = 238.21/x
  3. Step 3: Cross multiply
    247.45x = 339.00 × 238.21
  4. Step 4: Simplify right side
    247.45x = 80,752.85
  5. Step 5: Solve for x
    x = 80,752.85/247.45
  6. Step 6: Final answer
    x = 326.35

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.