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Finding the Fourth Proportional to 247.28, 369.40 and 189.48

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Solution

The fourth proportional to 247.28, 369.40 and 189.48 is: 283.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.28 : 369.40 = 189.48 : x
  2. Step 2: Convert to fraction form
    247.28/369.40 = 189.48/x
  3. Step 3: Cross multiply
    247.28x = 369.40 × 189.48
  4. Step 4: Simplify right side
    247.28x = 69,993.91
  5. Step 5: Solve for x
    x = 69,993.91/247.28
  6. Step 6: Final answer
    x = 283.06

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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.